396 results on '"Antireflection coating"'
Search Results
2. Reversible embroidered ball-like antireflective structure arrays inspired by leafhopper wings
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Kuan-Ting Chiang, Hongta Yang, Pei-Chun Li, and Huei-Yin Chen
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Materials science ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,law.invention ,Biomaterials ,Colloid and Surface Chemistry ,Coating ,law ,business.industry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Shape-memory polymer ,Anti-reflective coating ,Camouflage ,Ball (bearing) ,engineering ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business ,Refractive index ,Visible spectrum - Abstract
Highly transparent leafhopper (Thaia rubiginosa) wings are self-decorated with embroidered ball-shaped proteinaceous brochosmoes as distinct anti-predator defenses. The non-sticky brochosomal coating serves as antireflective structures for camouflage in vegetated environments. Inspired by the leafhopper wings, this study reports a new type of reversible antireflection coating enabled by integrating self-assembly methodologies using a shape memory polymer. The resulting embroidered ball-like structure array establishes a refractive index transition on surface, and thereby behaves omnidirectional antireflective characteristics in a broadband visible light region. Interestingly, the highly transparent appearance can be instantly erased and recovered by submerging in common liquids, such as water and ethanol, or by applying contact pressures at ambient conditions. Furthermore, the reversibility and structure-shape effect on the antireflective characteristics are systematically evaluated in this study. more...
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- 2021
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Catalog
3. BROADBAND ANTIREFLECTION COATING COMPOSED OF RESONANT SIGE PARTICLES OF SUBWAVELENGTH SIZE
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D. E. Utkin, E. N. Utkin, A. V. Tsarev, A.V. Latyshev, and Alexander A. Shklyaev
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Materials science ,Control and Systems Engineering ,business.industry ,Broadband ,Optoelectronics ,Antireflection coating ,business ,Software - Published
- 2021
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4. Design of Anti-Reflection Coatings for Application in the Infrared Region (10.6 micron)
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Tariq J. Alwan and Mushtak A. Jabbar
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Double layer (biology) ,Materials science ,General Computer Science ,Infrared ,business.industry ,chemistry.chemical_element ,Germanium ,General Chemistry ,Substrate (electronics) ,Reflectivity ,General Biochemistry, Genetics and Molecular Biology ,Reflection (mathematics) ,chemistry ,Optoelectronics ,Antireflection coating ,business ,Refractive index - Abstract
In this research, anti-reflection coatings consisting of single and double layers were designed in the IR (8 – 14μm) region to reduce the unwanted reflections of germanium (Ge) substrate. The reflectance of Ge substrate was about 36% per surface. These values were reduced reasonably by using single and double layer anti-reflection. The used layers were promoted in their performance by changing their thickness and refractive indices. The results indicated that the suggested structures are very efficient in reducing the reflectance of the Ge substrates in the selected region. The performance of the double layer antireflection coatings of ZnSe, BaF2 and BiF3 on Ge substrates is presented. more...
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- 2020
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5. Measuring the Reflective Spectra in a One-Beam Scheme
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A. A. Kovalyov
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010302 applied physics ,Materials science ,010308 nuclear & particles physics ,business.industry ,Physics::Optics ,Substrate (electronics) ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,01 natural sciences ,Spectral line ,Condensed Matter::Materials Science ,Reflection (mathematics) ,Reflection spectrum ,0103 physical sciences ,Optoelectronics ,Antireflection coating ,business ,Instrumentation ,Layer (electronics) ,Beam (structure) ,Quantum well - Abstract
A scheme for measuring the reflection spectrum with an accuracy of 10–3 for a wide spectral region is described. To demonstrate it, the reflection spectra of a GaAs substrate with an antireflection coating and a layer of InGaAsP/InP quantum wells on an InP substrate were obtained. more...
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- 2020
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6. Antireflection Coating Thickness Control for Silicon Solar Cells using Confocal Microscopy
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Sandeep Chandril
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Materials science ,Silicon ,chemistry ,business.industry ,Confocal microscopy ,law ,chemistry.chemical_element ,Optoelectronics ,Antireflection coating ,business ,law.invention - Published
- 2020
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7. Highly Stable and Efficient Mesoporous and Hollow Silica Antireflection Coatings for Perovskite Solar Cells
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Liming Cang, Ke Yang, Ling Wang, Xiang Liu, Wei Huang, Jinpei Wang, and Hui Zhang
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Materials science ,business.industry ,Wavelength range ,Energy Engineering and Power Technology ,Fresnel equations ,Photovoltaic conversion efficiency ,law.invention ,law ,Water uptake ,Solar cell ,Materials Chemistry ,Electrochemistry ,Chemical Engineering (miscellaneous) ,Optoelectronics ,Antireflection coating ,Electrical and Electronic Engineering ,business ,Mesoporous material ,Perovskite (structure) - Abstract
Fresnel reflection at the air–substrate interface of a solar cell inevitably occurs causing an important optical loss in photovoltaic conversion efficiency. Transparent materials with a low reflect... more...
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- 2020
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8. Design and fabrication of MgF2 single-layer antireflection coating by glancing angle deposition
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A.A. Mohammadi, H. Rezagholipour Dizaji, M. Gholizadeh, M.H. Ehsani, and R. Zarei Moghadam
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010302 applied physics ,Glancing angle deposition ,Fabrication ,Materials science ,business.industry ,Mechanical Engineering ,02 engineering and technology ,Vapour deposition ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Mechanics of Materials ,0103 physical sciences ,X-ray crystallography ,Optoelectronics ,Antireflection coating ,General Materials Science ,0210 nano-technology ,business ,Single layer - Abstract
In this work, MgF2 single-layers are designed by the Essential Macleod program and prepared by physical vapour deposition (PVD) using the glancing angle deposition (GLAD) technique. The samples wer... more...
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- 2020
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9. Progress in silicon microwire solar cells
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Han-Don Um, Deokjae Choi, Hyungwoo Kim, Namwoo Kim, Kangmin Lee, Jeonghwan Park, Kwanyong Seo, and Inchan Hwang
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Materials science ,Fabrication ,Silicon ,Renewable Energy, Sustainability and the Environment ,business.industry ,food and beverages ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Radius ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry ,Optoelectronics ,Antireflection coating ,General Materials Science ,Metal electrodes ,Diffusion (business) ,0210 nano-technology ,business ,Layer (electronics) - Abstract
Silicon microwires are very promising candidates for next-generation solar cells. Si microwires achieve strong broadband light absorption, acting as an antireflection coating layer. In addition to superior optical properties, Si microwires can effectively separate and collect photocarriers at the radial junction owing to a short diffusion length (equal to the microwire radius). This factor can relax the requirement for high-quality materials, enabling a reduction in the cost of producing solar cells. In this report, we review recent progress in vertically aligned Si microwire solar cells with reference to (1) optimized microwire structures to enhance light absorption, (2) uniform radial junctions for effective carrier separation, (3) minimization of surface recombination through surface treatments, and (4) fine metal electrodes for efficient carrier collection. In addition, we present studies on flexible crystalline Si solar cells that use mechanically flexible Si microwires. Furthermore, based on each fabrication process, we discuss the challenges related to the realization of high-efficiency Si microwire solar cells. more...
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- 2020
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10. IN-LINE SPUTTERING COATER OF HYDROPHOBIC ANTIREFLECTION COATING FOR SENSOR DISPLAYS
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A. S. Myslivets, P. A. Rozel, and E. A. Khakhlov
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Materials science ,magnetron sputtering ,TK7800-8360 ,oxide films ,business.industry ,Sputtering ,Optoelectronics ,Antireflection coating ,Electronics ,Line (text file) ,business ,vacuum system - Abstract
The aim of the work is to develop vacuum technological equipment for deposition an interference antireflection coating with the evaporation of a hydrophobic protective layer in a single vacuum cycle. To deposition an interference antireflection coating, the method of magnetron reactive sputtering in the alternating current mode with a frequency of 20 kHz is used. This method allows using of a wide range of sputtered materials and obtains stable and high-quality coatings on various substrates. To determine the optical characteristics, a spectrophotometer was used, which evaluated the transmittance and reflection in the visible region of the spectrum of electromagnetic radiation. To check the physical characteristics of the hydrophobic coating, abrasion test of the coating with metal wool with a load of 1 kg/cm2 was used. The novelty of the presented method is the combination of the liquid-phase coating method together with physical deposition in a vacuum without interrupting the process. This method allows increasing productivity and yield of suitable parts since the number of operations at the multi-stage stage of production of the touch display is reduced. After the development and adjustment of the Aurora G5 linear vacuum equipment, a stable and reproducible process for producing hydrophobic anti-reflective coatings over large areas with high performance was obtained. An antireflection coating was obtained with an average reflection coefficient of less than 0.6 % in the wavelength range of 400 to 700 nm. The adhesion test showed grade 0 according to the ISO classification. The resulting coatings have high hardness >9 H and abrasion resistance >5000 cycles. The result of this development and research is the introduction of vacuum processing equipment in the manufacturing process for the manufacture of anti-reflective hydrophobic coatings on touch displays. more...
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- 2019
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11. Synchronous tuning method for external-cavity diode lasers without antireflection coating based on nonlinearity correction model for internal and external cavities
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Zhiyong Wang, Zhigang Liu, Yu Zhu, and Xin Zhang
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Materials science ,Internal cavity ,External cavity ,Physics::Optics ,02 engineering and technology ,01 natural sciences ,law.invention ,010309 optics ,Optics ,Optical frequencies ,law ,0103 physical sciences ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Diode ,business.industry ,Linearity ,021001 nanoscience & nanotechnology ,Laser ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Nonlinear system ,Physics::Accelerator Physics ,Antireflection coating ,0210 nano-technology ,business - Abstract
Synchronous tuning can extend the mode-hop-free (MHF) tuning range of external-cavity diode lasers (ECDLs) without antireflection coating. However, due to nonlinearities in the internal and external cavities of ECDLs, the synchronous tuning ratio is not constant, causing detuning, which limits the MHF tuning range. To solve the nonlinearity mismatch between the two cavities, the nonlinearity of the internal cavity is identified and a correction model for the both cavities based on a mapping method is established. Further, the zero-vibration-derivative (ZVD) method is applied to optimize the dynamic response of the system. Experimental results show that MHF tuning in the full scanning period is achieved, and the optical frequency shows good linearity. more...
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- 2019
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12. Development of high efficient and ultra-broadband antireflection coating on calcium fluoride for electro-optical applications
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Sebahattin Tüzemen and Adem Yenisoy
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Materials science ,genetic structures ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,01 natural sciences ,law.invention ,Coating ,law ,0103 physical sciences ,Broadband ,Materials Chemistry ,010302 applied physics ,business.industry ,Surfaces and Interfaces ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Optical coating ,Anti-reflective coating ,chemistry ,engineering ,Fluorine ,Antireflection coating ,Optoelectronics ,0210 nano-technology ,business - Abstract
This study aims to demonstrate the development of multilayer antireflection (AR) coating on calcium fluoride (CaF2) optics. AR coating functions over ultra-broadband spectrum from 3.4 to 4....
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- 2019
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13. Silica-based antireflection coating by glancing angle deposition
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S. K. Pradhan and Satyajit Sarkar
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010302 applied physics ,Glancing angle deposition ,Materials science ,business.industry ,02 engineering and technology ,Surfaces and Interfaces ,Sputter deposition ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Reflectivity ,Surfaces, Coatings and Films ,0103 physical sciences ,Materials Chemistry ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business - Abstract
In this study, silica-based multilayer graded-index antireflection coatings have been developed by RF magnetron sputtering exploiting the mechanism of glancing angle deposition (GLAD). GLAD...
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- 2019
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14. Design and Optimization of the Antireflective Coating Properties of Silicon Solar Cells by Using Response Surface Methodology
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Hani Alzubi, Ghassan Tashtoush, and Yahia F. Makableh
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Materials science ,Silicon ,Nanoparticle ,chemistry.chemical_element ,Substrate (electronics) ,Nanomaterials ,law.invention ,chemistry.chemical_compound ,law ,Solar cell ,Materials Chemistry ,nanostructured materials ,Response surface methodology ,antireflection coating ,business.industry ,Surfaces and Interfaces ,Engineering (General). Civil engineering (General) ,Surfaces, Coatings and Films ,Anti-reflective coating ,response surface methodology (RSM) ,chemistry ,Titanium dioxide ,solar cells ,Optoelectronics ,TA1-2040 ,business - Abstract
The design and optimization of a nanostructured antireflective coatings for Si solar cells were performed by using response surface methodology (RSM). RSM was employed to investigate the effect on the overall optical performance of silicon solar cells coated with three different nanoparticle materials of titanium dioxide, aluminum oxide, and zinc oxide nanostructures. Central composite design was used for the optimization of the reflectance process and to study the main effects and interactions between the three process variables: nanomaterial type, the radius of nanoparticles, and wavelength of visible light. In this theoretical study, COMSOL Multiphysics was utilized to design the structures by using the wave optics module. The optical properties of the solar cell’s substrate and the three different nanomaterial types were studied. The results indicated that ZnO nanoparticles were the best antireflective coating candidate for Si, as the ZnO nanoparticles produced the lowest reflection values among the three nanomaterial types. The study reveals that the optimum conditions to reach minimum surface reflections for silicon solar cell were established by using ZnO nanoparticles with a radius of ~38 nm. On average, the reflectance reached ~5.5% along the visible spectral range, and approximately zero reflectance in the 550–600 nm range. more...
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- 2021
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15. Broadband Anti-Reflection Coatings Fabricated by Precise Time-Controlled and Oblique-Angle Deposition Methods
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Xin Guo, Xin Zhang, Chi Song, Qiang Li, Xiangqian Quan, Zizheng Li, and Binzhi Zhang
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Materials science ,oblique angle deposition ,02 engineering and technology ,engineering.material ,01 natural sciences ,law.invention ,010309 optics ,Coating ,law ,0103 physical sciences ,Broadband ,Materials Chemistry ,Deposition (phase transition) ,Thin film ,Wideband ,Photocurrent ,antireflection coating ,business.industry ,precise time controlled deposition ,Surfaces and Interfaces ,Engineering (General). Civil engineering (General) ,021001 nanoscience & nanotechnology ,Surfaces, Coatings and Films ,Anti-reflective coating ,engineering ,Optoelectronics ,broadband ,TA1-2040 ,0210 nano-technology ,business ,Layer (electronics) - Abstract
Broadband anti-reflection (AR) coatings are essential elements for improving the photocurrent generation of photovoltaic modules and enhancing visibility in optical devices. In this paper, we report a hybrid-structured, anti-reflection coating that combines multi-layer thin films with a single top-oblique deposited layer. By simply introducing this low-refractive index layer, the broadband anti-reflection properties of optical thin films can be improved while simplifying the preparation. Precise time-controlled and oblique-angle deposition (OAD) methods were used to fabricate the broadband AR coating. By accurately measuring and adjusting the design errors for the thin and thick film layers, 22-layer and 36-layer AR coatings on a sapphire substrate with a 400–2000 nm wideband were obtained. This bottom-up preparation process and AR coating design have the potential to significantly enhance the broadband antireflective properties for many optical systems and reduce the manufacturing cost of broadband AR coatings. more...
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- 2021
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16. Fresnel calculations of double/multi-layer antireflection coatings on silicon substrates
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Al Montazer Mandong and Abdullah Uzum
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Materials science ,Silicon ,business.industry ,Mechanical Engineering ,chemistry.chemical_element ,Fresnel equations ,chemistry ,Mechanics of Materials ,Optoelectronics ,Antireflection coating ,business ,Engineering (miscellaneous) ,Multi layer ,Civil and Structural Engineering - Published
- 2021
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17. In-Search of Efficient Antireflection Coating Layer for Crystalline Silicon Solar Cells: Optimization of the Thickness of Nb2O5 Thin Layer
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Tae-Gwan Kim, O-Bong Yang, Chong Yeal Kim, M. Shaheer Akhtar, Devendra Kc, and Deb Kumar Shah
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Materials science ,business.industry ,Applied Mathematics ,Thin layer ,General Engineering ,Energy Engineering and Power Technology ,Artificial Intelligence ,Chemistry (miscellaneous) ,Optoelectronics ,Antireflection coating ,General Materials Science ,Crystalline silicon ,Physical and Theoretical Chemistry ,business ,Layer (electronics) - Published
- 2021
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18. Large photocurrent density enhancement assisted by non-absorbing spherical dielectric nanoparticles in a GaAs layer
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Bhaskar Singh, Daniel M. Schaadt, and Mohammed M. Shabat
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Materials science ,Photon ,lcsh:Medicine ,Nanoparticle ,02 engineering and technology ,Dielectric ,engineering.material ,01 natural sciences ,Article ,Coating ,0103 physical sciences ,lcsh:Science ,010302 applied physics ,Photocurrent ,Nanophotonics and plasmonics ,Multidisciplinary ,business.industry ,lcsh:R ,021001 nanoscience & nanotechnology ,Photovoltaics ,Angle of incidence (optics) ,engineering ,Nanoparticles ,Optoelectronics ,Antireflection coating ,lcsh:Q ,0210 nano-technology ,business ,Layer (electronics) - Abstract
Herein, we report a theoretical investigation of large photocurrent density enhancement in a GaAs absorber layer due to non-absorbing spherical dielectric (SiO2) nanoparticles-based antireflection coating. The nanoparticles are embedded in a dielectric matrix (SiN) which improves the antireflection property of SiN ($$\lambda /4$$ λ / 4 coating) and let to pass more photons into the GaAs layer. The improvement is noticed omnidirectional and the highest is more than 100% at 85° angle of incidence with the nanoparticles’ surface filling density of 70%. Sunrise to sunset calculation of normalized photocurrent density over the course of a year have also shown improvements in the nanoparticles’ case. more...
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- 2020
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19. Characterization of InP/InGaAs Solar Cells Using Solid Zinc-Diffusion Source and ITO Antireflection Coating
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Wei-Chih Chiu, Yu-Tsen Tsai, Wen-Jeng Ho, Bao-Ying Pan, Hsi-Wen Hsu, and Jheng-Jie Liu
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Materials science ,business.industry ,Photovoltaic system ,Indium tin oxide ,Characterization (materials science) ,Zinc diffusion ,chemistry.chemical_compound ,chemistry ,Indium phosphide ,Optoelectronics ,Antireflection coating ,Quantum efficiency ,business ,Optical reflectance - Abstract
In this study, by measuring optical reflectance, external quantum efficiency and photovoltaic current-voltage under AM 1.5G solar simulation, the electrical and optical performance of InP/InGaAs solar cells with different thicknesses of ITO antireflective-coating were characterized. more...
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- 2020
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20. Formation of all-silica sculptured thin films based optical elements on crystal substrates
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Lukas Ramalis, Rytis Buzelis, Lina Grinevičiūtė, and Tomas Tolenis
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Materials science ,business.industry ,High-refractive-index polymer ,Laser ,law.invention ,Crystal ,law ,Reflection (physics) ,Optoelectronics ,Antireflection coating ,Thin film ,business ,Porosity ,Refractive index - Abstract
Optical components are the main parts in laser systems and also the limiting factor for high power laser. All-silica based optical components proved to have extremely high laser induced damage threshold and were already tested on standard glass substrates. Such coatings are fabricated by employing glancing angle deposition method, combination of nanostructured porous low refractive index and dense high refractive index thin films were fabricated. Anti-reflection coatings and mirrors with required reflection were achieved, which have superior LIDT values (50.7 J/cm2). Antireflection coating was deposited directly on BBO crystal and results are demonstrated. In this work, the possibility to improve microlaser systems with all-silica coatings is presented. more...
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- 2020
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21. Inverted pyramidally-textured PDMS antireflective foils for perovskite/silicon tandem solar cells with flat top cell
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Junfan Chen, Fuhua Hou, Huang Wei, Changchun Wei, Dekun Zhang, Zhongxin Zhou, Can Han, Shichong An, Yuelong Li, Xinliang Chen, Guangcai Wang, Biao Shi, Huizhi Ren, Yi Ding, Guofu Hou, Xiaodan Zhang, Ying Zhao, Qian Huang, Miro Zeman, Olindo Isabella, and Lingling Yan more...
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Materials science ,Silicon ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,Light management ,law ,General Materials Science ,Electrical and Electronic Engineering ,Perovskite (structure) ,Pyramid (geometry) ,PDMS layer ,Polydimethylsiloxane ,Tandem ,Renewable Energy, Sustainability and the Environment ,business.industry ,Energy conversion efficiency ,Pyramidal texture ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Perovskite/silicon tandem solar cell ,Anti-reflective coating ,chemistry ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business ,Current density - Abstract
Perovskite/silicon tandem solar cells (TSCs) have the potential to achieve power conversion efficiency exceeding 30%. To be compatible with high-efficiency solution-deposited perovskite top cell, a planar front surface for silicon bottom cell is generally required. However, flat front surfaces result in large light reflection losses and thus reduce the performance of tandem device. To boost light absorption, we design light management antireflective foils made from polydimethylsiloxane (PDMS) polymer carrying random-pyramidal textures with three different pyramid size ranges (1–3 µm, 3–8 µm, 8–15 µm). The optical properties, together with the reflection behavior applied to perovskite/silicon tandem solar cells have been systematically studied. One of the PDMS layer exhibited a relatively strong light-scattering property with a high average haze ratio originated from synergistic effect of the appropriate pyramid size and the uneven random pyramid distribution. Consequently, the short-circuit current density of the tandem device was improved by 1.72 mA/cm2 and thus its efficiency increased from 19.38% to 21.93%, after laminating the PDMS-based antireflection coating (ARC) onto the front surface of tandem device. Furthermore, this work provides a facile and cost-effective way to introduce light-management foils and indicates a broad strategy to enhance the performance of solar cells with planar front surface. more...
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- 2019
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22. Antireflection coating of diamond elements of power optics for CO2 lasers
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N V Artyushkin, Pavel A. Pivovarov, V V Butuzov, Vitaly I. Konov, N I Shchebetova, V R Sorochenko, V I Anisimov, K.V. Cherepanov, V S Pavelyev, V. G. Plotnichenko, V E Rogalin, and Victor A. Soifer
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Materials science ,business.industry ,Diamond ,020206 networking & telecommunications ,Statistical and Nonlinear Physics ,02 engineering and technology ,engineering.material ,Laser ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Power (physics) ,law.invention ,Optics ,law ,0202 electrical engineering, electronic engineering, information engineering ,engineering ,Antireflection coating ,020201 artificial intelligence & image processing ,Electrical and Electronic Engineering ,business - Published
- 2018
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23. Influence of Antireflection Coating on the Performance of Broadly Tunable Quantum Dot External Cavity Laser
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Zhanguo Wang, Xueqin Lv, and Peng Jin
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External cavity laser ,Materials science ,business.industry ,Quantum dot ,Biomedical Engineering ,Optoelectronics ,Antireflection coating ,General Materials Science ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,business - Published
- 2018
- Full Text
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24. Preparation single layer of (MgO) as antireflection coating using PLD technique
- Author
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Kadhim A. Aadim
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Diffraction ,Wavelength ,Nanostructure ,Reflection (mathematics) ,Materials science ,business.industry ,Near-infrared spectroscopy ,Optoelectronics ,Antireflection coating ,Substrate (electronics) ,business ,Pulsed laser deposition - Abstract
In this work preparation of antireflection coating with single layer of MgO using pulsed laser deposition (PLD) method which deposit on glass substrate with different thicknesses (90 and 100) nm annealed at temperature 500 K was done.The optical and structural properties (X-ray diffraction) have been determined. The optical reflectance was computed with the aid of MATLAB over the visible and near infrared region. Results shows that the best result obtained for optical performance of AR'Cs at 700 shots with thickness 90 nm nanostructure single layer AR'Cs and low reflection at wavelength 550 nm. more...
- Published
- 2018
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25. Reduced Fresnel Reflection by Photon Tunneling in Antireflection Coating Layer of Crystalline Si Solar Cells
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Hyung Yong Ji, Myeong Jun Kim, Sel Gi Ryu, Jong Hyeon Peck, and Keunjoo Kim
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Materials science ,business.industry ,Antireflection coating ,Optoelectronics ,Electrical and Electronic Engineering ,Photon tunneling ,Fresnel equations ,business ,Layer (electronics) ,Electronic, Optical and Magnetic Materials - Abstract
We investigated the light absorption of multi-antireflective layers on the microtextured surface of a crystalline silicon solar cell. Triple antireflection coating layers were deposited with SiNx/SiO2/SiNx thin films. A 20 nm SiO2 layer was sandwiched between two SiNx layers, forming a total thickness around 90 nm. Triple antireflection layers showed the enhanced light absorption in the infrared wavelength range, which is consistent with the Si energy band gap region. Further optical simulation on triple antireflection layers using a transfer matrix method showed similar reflection behavior to that of the experimental results. The SiO2 layer sandwiched between the SiNx thin films acts not only as the Fresnel reflection layer in the blue and UV spectral regions, but also as a photon tunneling layer in the infrared spectral region. more...
- Published
- 2018
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26. Design, Fabrication and Measurement of Pyramid-Type Antireflective Structures on Columnar Crystal Silicon Lens for Millimeter-Wave Astronomy
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Noda, K., Murayama, Y., Dominjon, A., Shan, W., Nakai, N., Nitta, Tom, Sekimoto, Yutaro, Hasebe, T., Sekiguchi, S., Nagai, Makoto, Hattori, S., Matsuo, Hiroshi, Naruse, Masato, and Kuno, Nario
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Silicon lens ,Fabrication ,Materials science ,Silicon ,chemistry.chemical_element ,01 natural sciences ,Radius of curvature (optics) ,law.invention ,010309 optics ,Optics ,law ,0103 physical sciences ,General Materials Science ,010303 astronomy & astrophysics ,business.industry ,Condensed Matter Physics ,Subwavelength structure ,Atomic and Molecular Physics, and Optics ,Lens (optics) ,Anti-reflective coating ,chemistry ,Extremely high frequency ,Dielectric loss ,Antireflection coating ,business ,Refractive index - Abstract
著者人数: 14名, Accepted: 2018-07-29, 資料番号: SA1180158000
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- 2018
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27. Antireflection nanocomposite coating on PV panel to improve power at maximum power point
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G. Durga Sukumar, M. Rama Krishna, and K. Rakesh Tej Kumar
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Materials science ,Nanocomposite ,Maximum power principle ,Renewable Energy, Sustainability and the Environment ,business.industry ,Nanocomposite coating ,Energy conversion efficiency ,Energy Engineering and Power Technology ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Power (physics) ,010309 optics ,Fuel Technology ,Solar cell efficiency ,Nuclear Energy and Engineering ,0103 physical sciences ,Optoelectronics ,Antireflection coating ,Point (geometry) ,0210 nano-technology ,business - Abstract
A thorough investigation was performed on various chemicals and nanocomposite materials to apply antireflection coating on the PV panel intending to improve the solar cell efficiency by generating ... more...
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- 2018
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28. Space Instrumentation of the WSO-UV Mission for Astrophysics Research
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A. S. Kirichenko, Sergey Kuzin, A. A. Pertsov, Mikhail Sachkov, A. S. Shugarov, and I. S. Savanov
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Surface (mathematics) ,Physics ,Scientific instrument ,business.industry ,Space (mathematics) ,Surfaces, Coatings and Films ,law.invention ,Telescope ,Optics ,law ,Antireflection coating ,Instrumentation (computer programming) ,business ,Radiation resistance ,World space - Abstract
The WSO-UV (World Space Observatory—Ultraviolet) space mission, optical design of the telescope, and main scientific instruments are briefly overviewed. A description of the photosensitive device of the WSO-UV mission based on a back-illuminated CCD with an antireflection coating is presented. Methods to improve the radiation resistance and reduce contamination on the CCD surface are described. more...
- Published
- 2018
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29. Studying the Formation of Antireflection Coatings on Multijunction Solar Cells
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V. M. Andreev, A. A. Blokhin, A. V. Malevskaya, and Yu. M. Zadiranov
- Subjects
010302 applied physics ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Heterojunction ,02 engineering and technology ,Adhesion ,Multijunction photovoltaic cell ,021001 nanoscience & nanotechnology ,Surface processing ,01 natural sciences ,Etching (microfabrication) ,0103 physical sciences ,Antireflection coating ,Optoelectronics ,Reflection coefficient ,0210 nano-technology ,business ,Semiconductor heterostructures - Abstract
The formation of antireflection coating on multijunction solar cells based on A3B5 semiconductor heterostructures has been studied at the stage of structure surface processing by methods of plasmachemical, wet chemical, and ion-beam etching. A technology of creating antireflection coatings based on TiOx/SiO2 layers is developed. The obtained coatings are characterized by improved adhesion to the surface of heterostructure and reduced reflection coefficient of multijunction solar cells. more...
- Published
- 2019
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30. A DESIGN OF BROADBAND AND LOW-LOSS MULTILAYER ANTIREFLECTION COATING IN THZ REGION
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Tsun-Hun Chang, Zih-Yu Chen, and Hsin-Yu Yao
- Subjects
Materials science ,business.industry ,Terahertz radiation ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,010309 optics ,0103 physical sciences ,Broadband ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business - Published
- 2018
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31. Optimization and Modeling of Antireflective Layers for Silicon Solar Cells: In Search of Optimal Materials
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Alassane Diaw, Oumar Absatou Niasse, Mamadou Diop, Moulaye Diagne, Joseph Sarr, Nacire Mbengue, Bassirou Ba, and Ousmane Ba
- Subjects
010302 applied physics ,Materials science ,Silicon ,business.industry ,chemistry.chemical_element ,02 engineering and technology ,General Medicine ,engineering.material ,021001 nanoscience & nanotechnology ,01 natural sciences ,Reflectivity ,law.invention ,Reflection (mathematics) ,Anti-reflective coating ,Coating ,chemistry ,law ,0103 physical sciences ,engineering ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business ,Layer (electronics) ,Refractive index - Abstract
Depositing an antireflection coating on the front surface of solar cells allows a significant reduction in reflection losses. It thus allows an increase in the efficiency of the cells. A modeling of the refractive indices and the thicknesses of an optimal antireflection coating has been proposed. Thus, the average reflective losses can be reduced to less than 8% and less than 2.4% in a large wavelength range respectively for a single-layer and double-layer anti-reflective coating types. However, the difficulty of finding these model materials (materials with the same refractive index) led us to introduce two notions: the refractive index difference and the thickness difference. These two notions allowed us to compare the reflectivity of the antireflection layer in silicon surface. Thus, the lower the refractive index difference is, the more the material resembles to the ideal material (in refractive index), and thus its reflective losses are minimal. SiNx and SiO2/TiO2 antireflection layers, in the wavelength range between 400 and 1100 nm, have reduced the average reflectivity losses to less than 9% and 2.3% respectively. more...
- Published
- 2018
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32. Optimization of Fabrication Parameters for High Performance Nano-powder Iron Oxide Production used as Antireflection Coating for Solar Energy Applications
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Marwa Fathy
- Subjects
chemistry.chemical_compound ,Materials science ,Fabrication ,chemistry ,business.industry ,Nano ,Electrochemistry ,Iron oxide ,Antireflection coating ,Nanotechnology ,Solar energy ,business - Published
- 2021
- Full Text
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33. Passivating antireflection coating of crystalline silicon using i/n a-Si:H/SiN trilayer
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Aiko Sato, Isao Sakata, Tatsuya Misawa, Shota Nunomura, Masaharu Shiratani, Naho Itagaki, and Mickael Lozac'h
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Materials science ,Passivation ,business.industry ,02 engineering and technology ,General Chemistry ,Carrier lifetime ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,law.invention ,Stack (abstract data type) ,law ,Solar cell ,Reflection (physics) ,Antireflection coating ,Optoelectronics ,General Materials Science ,Crystalline silicon ,0210 nano-technology ,business ,Layer (electronics) - Abstract
Passivating antireflection coating of crystalline silicon has been experimentally studied using a three-layered stack, consisting of an i/n a-Si:H/SiN trilayer. The passivation property is characterized by the minority carrier lifetime, which shows ≳ 1 ms for the i/n a-Si:H/SiN trilayer prepared at a temperature as low as 250 ∘C. The antireflection property is confirmed by a reflection of light of ≲ 2.0% at 550 nm and a low reflection in a wide range of visible and near-infrared regions, which is adequate for solar cell application, particularly in back-contact structure. The roles of each layer are discussed in terms of the chemical and field-effect passivation as well as the antireflection property. The optoelectronic properties of a neat SiN layer are also discussed to achieve a stable and reliable antireflection performance under the low-temperature growth conditions. more...
- Published
- 2021
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34. TiO2 nanotubes antireflection coating design for GaAs solar cells
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Marcela Patricia Barrera, Daniel Fabián Rodríguez, Simón Saint-André, and Patricia María Perillo
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Materials science ,Renewable Energy, Sustainability and the Environment ,business.industry ,Bilayer ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Electrochemical anodization ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Arc (geometry) ,law ,Solar cell ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business ,Porosity ,Short circuit ,Layer (electronics) - Abstract
The results of the optimization of antireflection films of TiO2 nanotubes on GaAs solar cells, non-encapsulated and encapsulated, are presented. The ARC forms a bilayer of porous TiO2 over a dense bottom. The films were prepared on Si and GaAs substrates via a versatile electrochemical anodization process which produces films with good optical performance. The thicknesses and porosity of the ARC were optimized numerically with a method based on maximizing the short circuit current. Using experimental indices, the minimum Rw was 1.81% for the non-encapsulated case. For the encapsulated case, the lowest Rw was 2.34%, where the porosity of the top layer was adjusted in addition to the thicknesses. In simulations of a GaAs solar cell, the addition of the optimized ARC resulted in a Jsc increase of 43.6% for the non-encapsulated case, and 36.7% for the encapsulated case. more...
- Published
- 2021
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35. High performance TiO 2 nanotubes antireflection coating
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Daniel Fabián Rodríguez, Marcela Patricia Barrera, and Patricia María Perillo
- Subjects
Void (astronomy) ,Materials science ,Silicon ,NANOTUBES ,chemistry.chemical_element ,INGENIERÍAS Y TECNOLOGÍAS ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Electrochemical anodization ,Optics ,Ellipsometry ,General Materials Science ,Otras Ingeniería Eléctrica, Ingeniería Electrónica e Ingeniería de la Información ,Composite material ,Thin film ,Porosity ,Ingeniería Eléctrica, Ingeniería Electrónica e Ingeniería de la Información ,ANTIREFLECTION ,business.industry ,Mechanical Engineering ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,0104 chemical sciences ,chemistry ,Mechanics of Materials ,SPECTROSCOPIC ELLIPSOMETRY ,TIO2 ,Antireflection coating ,0210 nano-technology ,business ,Refractive index - Abstract
The present study analyzes the use of TiO2 layer as antireflection coating. TiO2 thin films were prepared on silicon substrate by electrochemical anodization process with thicknesses of 130 and 170 nm. The films exhibit a uniform nanotubular structure. The ellipsometry measurement data were analyzed using a multi-layer model, the bottom layer is a dense layer of TiO2 and the top layers are porous; they are formed by a mixture of TiO2 and void. The values of refractive index are obtained by the Bruggeman effective medium approximation. The refractive indexes of the bottom and top TiO2 sublayers were about 2.3 and 1.6, respectively. The lower values of reflectance are obtained with the thinnest film. For these samples the reflectance decreases about 90% compared to silicon and in some cases the reflectivity is less than 5%. The thickness influences of TiO2 thin films and their synthesis parameters on the optical constants are discussed. Fil: Rodriguez, Daniel Fabian. Comisión Nacional de Energía Atómica. Gerencia de Área de Investigación y Aplicaciones no Nucleares. Gerencia de Desarrollo Tecnológico y Proyectos Especiales. Departamento de Micro y Nanotecnología; Argentina Fil: Perillo, Patricia María. Comisión Nacional de Energía Atómica. Gerencia de Área de Investigación y Aplicaciones no Nucleares. Gerencia de Desarrollo Tecnológico y Proyectos Especiales. Departamento de Micro y Nanotecnología; Argentina Fil: Barrera, Marcela Patricia. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina more...
- Published
- 2017
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36. 15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates
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Zachary C. Holman, Diego Martín-Martín, Shizhao Fan, Michelle Vaisman, Kevin Nay Yaung, Emmett E. Perl, Minjoo Larry Lee, Zhengshan Jason Yu, and Mehdi Leilaeioun
- Subjects
010302 applied physics ,Materials science ,Tandem ,Renewable Energy, Sustainability and the Environment ,business.industry ,Energy Engineering and Power Technology ,02 engineering and technology ,Spectral efficiency ,021001 nanoscience & nanotechnology ,01 natural sciences ,7. Clean energy ,Fuel Technology ,Template ,Chemistry (miscellaneous) ,Photovoltaics ,Material quality ,0103 physical sciences ,Materials Chemistry ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business ,Optical filter ,Visible spectrum - Abstract
As single-junction Si solar cells approach their practical efficiency limits, a new pathway is necessary to increase efficiency in order to realize more cost-effective photovoltaics. Integrating III–V cells onto Si in a multijunction architecture is a promising approach that can achieve high efficiency while leveraging the infrastructure already in place for Si and III–V technology. In this Letter, we demonstrate a record 15.3%-efficient 1.7 eV GaAsP top cell on GaP/Si, enabled by recent advances in material quality in conjunction with an improved device design and a high-performance antireflection coating. We further present a separate Si bottom cell with a 1.7 eV GaAsP optical filter to absorb most of the visible light with an efficiency of 6.3%, showing the feasibility of monolithic III–V/Si tandems with >20% efficiency. Through spectral efficiency analysis, we compare our results to previously published GaAsP and Si devices, projecting tandem GaAsP/Si efficiencies of up to 25.6% based on current state... more...
- Published
- 2017
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37. Bismuth Nanofilms as Efficient Broadband THz Antireflection Coating
- Author
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Laurenz Kremeyer, Günter Reiss, Alexander Stroh, Wentao Zhang, Michael Horn-von Hoegen, Jungwoo Koo, Dmitry Turchinovich, Frank Meyer zu Heringdorf, Hassan A. Hafez, and Savio Fabretti
- Subjects
0301 basic medicine ,Materials science ,Silicon ,business.industry ,Terahertz radiation ,Impedance matching ,chemistry.chemical_element ,02 engineering and technology ,Dielectric ,Conductivity ,021001 nanoscience & nanotechnology ,Bismuth ,03 medical and health sciences ,030104 developmental biology ,chemistry ,Broadband ,Optoelectronics ,Antireflection coating ,0210 nano-technology ,business - Abstract
We demonstrate the broadband THz antireflection coating based on bismuth nanofilms. The antireflection effect stems from the complex-valued conductivity of bismuth, providing excellent impedance matching with high-index dielectrics such as silicon, in the range of at least 0–4 THz. The details of THz conductivity of bismuth will also be presented. more...
- Published
- 2020
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38. The optical parameters of TiO2 antireflection coating prepared by atomic layer deposition method for photovoltaic application
- Author
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Magdalena M. Szindler and Marek Szindler
- Subjects
Atomic layer deposition ,Materials science ,business.industry ,Photovoltaic system ,Antireflection coating ,Optoelectronics ,business ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials - Abstract
Titanium dioxide thin films have been deposited on silicon wafers substrates by an atomic layer deposition (ALD) method. There optical parameters were investigated by spectroscopic ellipsometry and UV/VIS spectroscopy. A material with a refractive index of 2.41 was obtained. Additionally, in a wide spectral range it was possible to reduce the reflection from the silicon surface below 5%. The Raman spectroscopy method was used for structural characterization of anatase TiO2 thin films. Their uniformity and chemical composition are confirmed by a scanning electron microscope (SEM) energy dispersive spectrometer (EDS). more...
- Published
- 2020
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39. An Antireflection Coating of a Germanium Subcell in GaInP/GaAs/Ge Solar Cells
- Author
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V. M. Andreev, V. M. Emelyanov, S. A. Mintairov, and N. A. Kalyuzhnyi
- Subjects
010302 applied physics ,Photocurrent ,Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Nucleation ,chemistry.chemical_element ,Germanium ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,chemistry ,0103 physical sciences ,Antireflection coating ,Optoelectronics ,Diffusion (business) ,0210 nano-technology ,business ,Layer (electronics) - Abstract
Spectral characteristics of the Ge subcell of triple-junction GaInP/GaAs/Ge solar cells have been simulated. It was shown that using a GaInP nucleation layer that creates a shallow diffusion p–n junction in Ge can raise the photogeneration current of the Ge subcell by ~4.5 mA/cm2 as compared with the value in the case of a GaAs nucleation layer. The optimal thickness of the GaInP layer (170–180 nm) makes it possible to additionally raise the photocurrent by ~1.5 mA/cm2. It was experimentally demonstrated that the photogenerated current of the Ge subcell of GaInP/GaAs/Ge solar cells increases by 3.9 mA/cm2 on replacing the GaAs nucleation layer with GaInP and there is an additional gain by 0.9 mA/cm2 on using the optimal thickness of the GaInP nucleation layer. more...
- Published
- 2018
- Full Text
- View/download PDF
40. ß-Ga2O3/Si Heterojunction Photodiode with ZnO ARC layer in the UV Detection
- Author
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Abdullah Yildiz, Abdullah Atilgan, Ugur Harmanci, and Nur Efsan Koksal
- Subjects
Spin coating ,Materials science ,business.industry ,020209 energy ,020208 electrical & electronic engineering ,Heterojunction ,02 engineering and technology ,Photodiode ,law.invention ,Arc (geometry) ,law ,0202 electrical engineering, electronic engineering, information engineering ,Optoelectronics ,Antireflection coating ,Uv detection ,business ,Layer (electronics) - Abstract
In this work, a new Ga 2 O 3 /p-Si photodiodes with ZnO ARC layer are formed by sol-gel spin coating technique. Upon 254 nm and 395 nm UV illuminations, the device’s performances were examined in terms of electrical parameters. Under a 254 nm, a good photoresponse behavior was observed. Also, lower ideality factor and higher barrier height is obtained from current-voltage characteristics. The device is solarblind since the device does not show any significant improvement upon 395 nm. This study with combination of ZnO antireflection coating layer is prominent candidate for UV solar-blind optoelectronic devices. more...
- Published
- 2019
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- View/download PDF
41. Effective Coating for High Efficiency Triple Junction Solar Cells
- Author
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Francesco Bissoli, Erminio Greco, Alessandro Mezzetti, Roberta Campesato, Alessandro di Mezza, and Fabio Di Fonzo
- Subjects
Photocurrent ,Range (particle radiation) ,Materials science ,Field (physics) ,business.industry ,Triple junction ,Space Solar Cells ,High Conversion Efficiency ,engineering.material ,Arc (geometry) ,Solar cell efficiency ,Coating ,engineering ,Optoelectronics ,Antireflection coating ,business - Abstract
An important field to improve solar cell efficiency is the optimization of the antireflection coating (ARC) to allow more light to be converted; from a theoretical point of view this could increase the solar cell efficiency of 0.5%. Different ARC designs have been investigated, the most promising approaches are based on multi layers or gradient index approaches. These approaches have been theoretically and experimentally optimized to increase the photocurrent in the spectral range 300-1880 nm. Experimental results show that the solar cell efficiency can be increased of 0.5% both on thin and standard CESI space solar cells having 30% BOL efficiency. more...
- Published
- 2019
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- View/download PDF
42. Hybrid Nanostructured Antireflection Coating by Self-Assembled Nanosphere Lithography
- Author
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Jinsong Gao, Haigui Yang, Qiang Li, Xiangjun Xiang, Xiaoyi Wang, Chi Song, and Zizheng Li
- Subjects
Photocurrent ,Nanostructure ,Materials science ,antireflection coating ,nanostructure ,business.industry ,Surfaces and Interfaces ,Substrate (electronics) ,self-assembling ,Surfaces, Coatings and Films ,law.invention ,multilayer thin-film ,chemistry.chemical_compound ,Anti-reflective coating ,chemistry ,lcsh:TA1-2040 ,Etching (microfabrication) ,law ,Materials Chemistry ,Optoelectronics ,Nanosphere lithography ,Polystyrene ,lcsh:Engineering (General). Civil engineering (General) ,business ,Refractive index - Abstract
Broadband antireflection (AR) coatings are essential elements for improving the photocurrent generation of photovoltaic modules or the enhancement of visibility in optical devices. In this paper, we report a hybrid nanostructured antireflection coating combination that is a clean and efficient method for fabricating a nanostructured antireflection coating (ARC). A multilayer thin-film was introduced between the ARC and substrate to solve the significant problem of preparing nanostructured ARCs on different substrates. In this way, we rebuilt a gradient refractive index structure and optimize the antireflective property by simply adjusting the moth-eye structure and multilayers. Subwavelength-structured cone arrays were directly patterned using a self-assembled single-layer polystyrene (PS) nanosphere array as an etching mask. Nanostructure coatings exhibited excellent broadband and wide-angle antireflective properties. The bottom-up preparation process and hybrid structural combination have the potential to significantly enhance the broadband and wide-angle antireflective properties for a number of optical systems that require high transparency, which is promising for reducing the manufacturing cost of nanostructured AR coatings. more...
- Published
- 2019
- Full Text
- View/download PDF
43. Optimization of multilayer antireflection coatings for improving performance of silicon solar cells
- Author
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Jaker Hossain, Md. Shaon Sarker, Most. Farzana Khatun, and Sheikh Rashel Al Ahmed
- Subjects
Materials science ,Silicon ,business.industry ,High-refractive-index polymer ,Reflection loss ,chemistry.chemical_element ,Substrate (electronics) ,Reflectivity ,law.invention ,chemistry ,law ,Personal computer ,Solar cell ,Antireflection coating ,Optoelectronics ,business - Abstract
In this study, a comprehensive idea of designing multilayer antireflection coating (ARC) on the solar cell and minimization of the overall reflectance are provided. A theoretical model for the optimization of multilayer antireflection coating for solar cell has been presented on the basis of optical interference transfer-matrix theory. Also, PCID simulation has been carried out to understand the performance of silicon solar cell of antireflection coating. Reflectance calculation for various single, double and three ARCs on silicon substrate are presented. Optical reflection values were deduced with this transfer-matrix formulation via a personal computer using MATLAB program. The reflection loss has been calculated lower than 34.66%, 8.47%, and 5.71% using single, double, and three layers respectively with high refractive index materials. External quantum efficiencies (EQEs) of 65.34% and 81.81% were obtained for the single and double layers ARCs on silicon substrate. It was also observed that the thickness of the antireflection coating should be less about 200 nm. Therefore, it is suggested that the antireflection layers proposed in this study effective to improve the efficiency of solar cell. more...
- Published
- 2019
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- View/download PDF
44. Effect of obliquity of incident light on the performance of silicon solar cells
- Author
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Rajinder Sharma
- Subjects
0301 basic medicine ,Materials science ,Silicon ,Transfer-matrix method (optics) ,chemistry.chemical_element ,Reflectance ,Article ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Optics ,law ,EQE ,Solar cell ,lcsh:Social sciences (General) ,lcsh:Science (General) ,PC1Dmod ,Multidisciplinary ,Energy ,business.industry ,Energy conversion efficiency ,Applied mathematics ,Ray ,Reflectivity ,ARC ,030104 developmental biology ,chemistry ,Antireflection coating ,lcsh:H1-99 ,Obliquity of sunlight ,business ,Conversion efficiency ,Short circuit ,030217 neurology & neurosurgery ,lcsh:Q1-390 - Abstract
The aim of this work is to investigate the effect of angle of incident light on the performance of silicon solar cell. In this regard, numerical calculations have been performed to obtain the reflectance for double layer antireflection coating (DLARC) of Si 3 N 4 at various angles of incidence (i.e. 0 o , 15 o , 30 o , 45 o , a n d 60 o ) using transfer matrix method. Reflectances obtained, are found to increases with increase in angle of incidence. Calculated reflectances have been further used in the PC1D simulator as external reflectance files to study the performance of silicon solar cell. As a result of the simulation, the conversion efficiency (and short circuit current) of solar cell is found to decrease by 1.7% (0.062 mA/cm 2 ) with increase in angle of incidence from 0 o t o 60 o . more...
- Published
- 2019
45. Polymeric infrared antireflection coating for silicon substrates (Conference Presentation)
- Author
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Tristan S. Kleine, Abhinav Nishant, Nicholas P. Lyons, Laura E. Anderson, Katrina M. Konopka, Robert A. Norwood, and Jeffrey Pyun
- Subjects
Presentation ,Materials science ,Silicon ,chemistry ,business.industry ,Infrared ,media_common.quotation_subject ,Optoelectronics ,Antireflection coating ,chemistry.chemical_element ,business ,media_common - Published
- 2019
- Full Text
- View/download PDF
46. Mathematical modeling of antireflection coating based on double negative index materials
- Author
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Mohammed M. Shabat, Daniel M. Schaadt, Shaban Safi, and Kholoud Kh. Abushaar
- Subjects
Index (economics) ,Materials science ,business.industry ,Transfer-matrix method (optics) ,Metamaterial ,Statistical and Nonlinear Physics ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0103 physical sciences ,Antireflection coating ,Optoelectronics ,010306 general physics ,0210 nano-technology ,business - Abstract
New artificial Negative index materials (NIMs) or metamaterials have rapidly attracted researchers and industry due to their unusual properties. Applications of various NIMs have been found to be used in manufacturing and design some nano devices such as optical sensors and solar cells. The concept of solar cells depends on the maximizing the light transmission and minimizing the reflection. We propose solar cell structure model based on NIMs to enhance the light efficiency in solar cells. The proposed structure consists of four layers including two NIMs layers called Double NIMs. The simulation of the proposed model has been done utilizing the Transfer Matrix Method (TMM). High transmission and low reflection have been obtained. Solar cells based on double NIMs show promising future and could successfully be used to design highly efficient solar cells. more...
- Published
- 2021
- Full Text
- View/download PDF
47. Influence of Chirped DBR Reflector on the Absorption Efficiency of Multi-nanolayer Photovoltaic Structures: Wavelength-scale Analysis by the Method of Single Expression
- Author
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Tamara M. Knyazyan, Trevor M. Benson, Gurgen R. Mardoyan, Hovik Baghdasaryan, Marian Marciniak, and T. T. Hovhannisyan
- Subjects
Materials science ,Computer Networks and Communications ,business.industry ,020209 energy ,Wavelength scale ,Photovoltaic system ,Reflector (antenna) ,02 engineering and technology ,Expression (mathematics) ,Optics ,Photovoltaics ,0202 electrical engineering, electronic engineering, information engineering ,Antireflection coating ,Computational electromagnetics ,Optoelectronics ,Electrical and Electronic Engineering ,Absorption efficiency ,business - Abstract
An electromagnetic wavelength-scale analysis of the optical characteristics of multi-nanolayer photovoltaic (PV) structures: without an antireflection coating, with an antireflection coating on the top of the structure, and with both the antireflection coating on the top and a broadband non-periodic (chirped) distributed Bragg reflector (DBR) on the bottom of the structure is performed. All the PV structures studied are based on a Si p-i-n type absorber supported by a metallic layer (Cu) and SiO2 substrate. The top-to-bottom electromagnetic analysis is performed numerically by the method of single expression (MSE). Absorbing and reflecting characteristics of the multi-nanolayer PV structures are obtained. The influence of the thicknesses and permittivities of the layers of the PV structures on the absorbing characteristics of the structures is analyzed to reveal favourable configurations for enhancement of their absorption efficiency. The localizations of the electric component of the optical field and the power flow distribution within all the PV structures considered are obtained to confirm an enhancement of the absorption efficiency in the favorable configuration. The results of the electromagnetic wavelength-scale analysis undertaken will have scientific and practical importance for optimizing the operation of thin-filmmulti-nanolayer PV structures incorporating a chirped DBR reflector with regards to enhancing their efficiency. more...
- Published
- 2017
- Full Text
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48. Influence of double- and triple-layer antireflection coatings on the formation of photocurrents in multijunction III–V solar cells
- Author
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I. V. Bychkov, M. Z. Shvarts, A. P. Anzulevich, S. B. Musalinov, and Alexander S. Gudovskikh
- Subjects
Photocurrent ,Materials science ,business.industry ,Triple layer ,020502 materials ,Reflection loss ,Quantum yield ,Heterojunction ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Optics ,0205 materials engineering ,law ,Solar cell ,Antireflection coating ,Optoelectronics ,Irradiation ,0210 nano-technology ,business - Abstract
The results of simulation by the transfer-matrix method of TiO2/SiO2 double-layer and TiO2/Si3N4/SiO2 triple-layer antireflection coatings for multijunction InGaP/GaAs/Ge heterostructure solar cells are presented. The TiO2/SiO2 double-layer antireflection coating is experimentally developed and optimized. The experimental spectral dependences of the external quantum yield of the InGaP/GaAs/Ge heterostructure solar cell and optical characteristics of antireflection coatings, obtained in the simulation, are used to determine the photogenerated current densities of each subcell in the InGaP/GaAs/Ge solar cell under AM1.5D irradiation conditions (1000 W/m2) and for the case of zero reflection loss. It is shown in the simulation that the optimized TiO2/Si3N4/SiO2 triple-layer antireflection coating provides a 2.3 mA/cm2 gain in the photocurrent density for the Ge subcell under AM1.5D conditions in comparison with the TiO2/SiO2 double-layer antireflection coating under consideration. This thereby provides an increase in the fill factor of the current–voltage curve and in the output electric power of the multijunction solar cell. more...
- Published
- 2017
- Full Text
- View/download PDF
49. Combinatorial synthesis of BaClF-ReF3 (Re = La, Pr, Er, Sm) layers with graded-index as antireflection coatings in the thermal infrared
- Author
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Hai-Han Luo, Weitao Su, Bin Li, Dingquan Liu, Xiaofeng Ma, and Ping Xie
- Subjects
Materials science ,Thermal infrared ,Infrared ,business.industry ,Mechanical Engineering ,Coating materials ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Combinatorial synthesis ,01 natural sciences ,Durability ,0104 chemical sciences ,Characterization (materials science) ,Optics ,Mechanics of Materials ,lcsh:TA401-492 ,Antireflection coating ,Optoelectronics ,lcsh:Materials of engineering and construction. Mechanics of materials ,General Materials Science ,0210 nano-technology ,business ,Layer (electronics) - Abstract
It is a well-known fact that optical components used in the thermal infrared would be disabled without antireflection coatings due to the serious Fresnel reflections on their surfaces. The antireflection coating consisting of a single inhomogeneous layer with graded-index is an important solution. In our investigation, the combinatorial materials libraries were synthesized to explore the composition dependence of the durability and antireflection characterization of graded-index layers deposited from four rare-earth fluorides LaF3, PrF3, ErF3 and SmF3, admixed with a different amount of BaClF. It was demonstrated that the layers are robust enough to withstand normal handling and environmental conditions, furthermore, the best antireflection approach for the Ge surfaces can be achieved for the BaClF-LaF3 layer with a BaClF concentration x = 0.51, through the high-throughput characterization of the robustness and the spectral transmittance of the elements in the libraries. Because the optimized characteristics of a Gaussian index profile followed by a quintic-profile can be created in the layers, an effective refractive index around 1.2 can be achieved, which is lower than those of infrared low-index coating materials used commonly. Keywords: Antireflection coating, Combinatorial synthesis, Rare-earth fluoride, Durability, Graded refractive index more...
- Published
- 2016
- Full Text
- View/download PDF
50. TCAD design of silicon solar cells in comparison of antireflection coatings and back surface field
- Author
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Sohail A. Khan, Khuram Ali, and Mohd Zubir MatJafri
- Subjects
Fabrication ,Materials science ,Silicon ,chemistry.chemical_element ,02 engineering and technology ,01 natural sciences ,law.invention ,010309 optics ,Arc (geometry) ,Optics ,law ,0103 physical sciences ,Solar cell ,Electrical and Electronic Engineering ,business.industry ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,Anti-reflective coating ,Back surface field ,chemistry ,Antireflection coating ,Optoelectronics ,0210 nano-technology ,business ,Single layer - Abstract
This paper presents the development of a physically based solar cell simulation using the Silvaco-TCAD simulator. Simulations were performed on a Si based solar cell with antireflection coating (ARC), without ARC and ARC with back surface field. Single layer SiO 2 ARC was used and its effect on each solar cell was analysed. The effect of BSF and AR coatings on the performance of the solar cells were performed using AM 1.5 G. The Si solar cell with SiO 2 AR coating and BSF cell demonstrated increased efficiencies of about 154%, and 77%, respectively, compared with the non-ARC BSF Si solar cell. The addition of the BSF initiated 43% improvement in the efficiency of Si solar cells, compared with 5.9% of the SiO 2 (AR) coated non-BSF Si solar cell. The designed model indicate the potential of combining the SiO 2 AR coating with BSF in the improved fabrication of high-efficiency, low-cost Si solar cells. more...
- Published
- 2016
- Full Text
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