Search

Your search keyword '"Baudrit, Mathieu"' showing total 117 results
Start Over Author "Baudrit, Mathieu"
117 results on '"Baudrit, Mathieu"'

2. How did the knowledge of CPV contribute to the standardization activity of VIPV?

Author

Araki, Kenji, primary, Ji, Liang, additional, Kelly, George, additional, Ham, Arjo van der, additional, Agudo, Emilio, additional, Antón, Ignacio, additional, Baudrit, Mathieu, additional, Carr, Anna, additional, Herrero, Rebeca, additional, Kurtz, Sarah, additional, Liu, Zhengxin, additional, Pravettoni, Mauro, additional, Ota, Yasuyuki, additional, Tobita, Hiromi, additional, Yoon, Sewang, additional, Yoshita, Masahiro, additional, Yamaguchi, Masafumi, additional, and Nishioka, Kensuke, additional

Published
2020
Full Text
View/download PDF

3. Modeling and Standardization Researches and Discussions of the Car-roof PV through International Web Meetings

Author

Araki, Kenji, primary, Liu, Zhengxin, additional, Limpinsel, Moritz, additional, Lu, Zhonglin, additional, Pravettoni, Mauro, additional, Robusto, Paul, additional, Tobita, Hiromi, additional, Wu, Qian, additional, Wu, Zhenyu, additional, Yoon, Sewang, additional, Yamaguchi, Masafumi, additional, Ji, Liang, additional, Kelly, George, additional, Agudo, Emilio, additional, Anton, Ignacio, additional, Baudrit, Mathieu, additional, Carr, Anna, additional, Herrero, Rebeca, additional, and Kurtz, Sarah, additional

Published
2019
Full Text
View/download PDF

4. Mechanical tolerances study through simulations and experimental characterization for a 1000X micro-concentrator CPV module

Author

Besson, Pierre, Ritou, Arnaud, Voarino, Philippe, Goubault, Baptiste, David, Nadine, Bernardis, Sarah, Raccurt, Olivier, Baudrit, Mathieu, Nutrition, croissance et cancer (U 1069) (N2C), Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Unité de cardiopédiatrie, CHU Rouen, Normandie Université (NU)-Normandie Université (NU), ARC-Nucleart CEA Grenoble (NUCLEART), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de L'Energie Solaire (INES), and Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Tours

Subjects
010302 applied physics, Engineering, business.industry, Optical engineering, Process (computing), Mechanical engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, Concentrator, Suns in alchemy, 7. Clean energy, 01 natural sciences, Characterization (materials science), law.invention, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, Solar cell, Focal length, 0210 nano-technology, business, ComputingMilieux_MISCELLANEOUS, Light-emitting diode
Abstract

Existing CPV technology markets are not compliant with a standard configuration. Concentrations vary from several suns to more than 1000 suns and the optical technology used could be very different. Nowadays, the market trends are moving toward more and more compact optical systems in order to exploit the Light Emitting Diode (LED) like approach. The aim is to increase the optical efficiency by using an ultra-short focal distance and to improve thermal management. Moreover the efficiency to weight ratio is increasing and the solar cell size becomes sub-millimetric. With these conditions, more stringent mechanical tolerances are essential to ensure an optimum optical alignment between cells and optics. A new process of micro-concentrator manufacturing is developed in this work. This process enables manufacturing and auto-alignment of Primary Optical Elements (POE) with Secondary Optical Elements (SOE) and solar cells with respect to certain mechanical tolerances. A 1000X micro-concentrator is manufactured ...

Published
2017
Full Text
View/download PDF

7. Evaluation of the SOPHIA CPV module round robin on power rating at CSOC

Author

Siefer, G., Steiner, Marc, Baudrit, Mathieu, Domínguez Domínguez, César, Anton Hernandez, Ignacio, Roca, Franco, Fucci, Raffaele, Pugliatti, Paola Maria, Di Stefano, Agnese, Kenny, Robert, Norton, Matthew, Minuto, Alessandro, Morabito, Paolo, and Muller, M.

Subjects
Telecomunicaciones, Energías Renovables
Abstract

As the SOPHIA round robin aims for comparing different power rating methods, all partners agreed to use the same measurement guideline. This guideline considers the module alignment, the data requirement and the duration of data collection. Three methods to calculate the rated power from measurement data based on regression, averaging or translation are already evaluated using data of the first four partners. Initial results show maximum deviations in the rated power output between the test labs of less than about four per cent for the investigated rating methods.

Published
2016

8. Wafer-Bonded AlGaAs///Si Dual-Junction Solar Cells

Author

Veinberg-Vidal, Elias, primary, Vauche, Laura, additional, Weick, Clement, additional, Da Fonseca, Jeremy, additional, Jany, Christophe, additional, Morales, Christophe, additional, Lecouvey, Christophe, additional, Desrues, Thibaut, additional, Voarino, Philippe, additional, Fournel, Frank, additional, Kaminski-Cachopo, Anne, additional, Datas, Alejandro, additional, Garcia-Linares, Pablo, additional, Baudrit, Mathieu, additional, Mur, Pierre, additional, and Dupre, Cecilia, additional

Published
2017
Full Text
View/download PDF

9. Wafer bonding approaches for III-V on Si multi-junction solar cells

Author

Vauche, Laura, primary, Veinberg-Vidal, Elias, additional, Weick, Clement, additional, Morales, Christophe, additional, Larrey, Vincent, additional, Lecouvey, Christophe, additional, Martin, Mickael, additional, Da Fonseca, Jeremy, additional, Jany, Christophe, additional, Desrues, Thibaut, additional, Brughera, Celine, additional, Voarino, Philippe, additional, Salvetat, Thierry, additional, Fournel, Frank, additional, Baudrit, Mathieu, additional, and Dupre, Cecilia, additional

Published
2017
Full Text
View/download PDF

10. Rating of CPV Modules: Results of Module Round Robins

Author

Steiner, M., Siefer, Gerald, Baudrit, Mathieu, Askins, Stephen, Domínguez Domínguez, César, Antón Hernández, Ignacio, Roca, F., Fucci, Rafaelle, Cancro, C., Romano, A., Graditti, G., Pugliatti, Paola Maria, Di Stefano, A., Kenny, R., Norton, M., Minuto, A., Morabito, A., Muller, M., Riley, D., Pratt, L., Steiner, M., Siefer, Gerald, Baudrit, Mathieu, Askins, Stephen, Domínguez Domínguez, César, Antón Hernández, Ignacio, Roca, F., Fucci, Rafaelle, Cancro, C., Romano, A., Graditti, G., Pugliatti, Paola Maria, Di Stefano, A., Kenny, R., Norton, M., Minuto, A., Morabito, A., Muller, M., Riley, D., and Pratt, L.

Abstract

The results of three CPV module round robins are presented. Ten test labs around the world participated to the round robins in total. Each round robin used a different CPV module technology (Daido Steel, Soitec, Suncore). The data gathered at the test labs was used to test CSOC power rating procedures as basis for the IEC draft standard 62670-3. The deviation between the minimum and the maximum power output rated at the test labs was in average 4.4 % with a standard deviation of 1.8 %abs. This underlines that power ratings or CPV modules are reliable and reproducible.

Published
2017

11. NGCPV: a new Generation of concentrator photovoltaic cells, modules and systems

Author

Datas, A., Cristobal López, Ana Belén, Sala Pano, Gabriel, Antón, Ignacio, Miñano Dominguez, Juan Carlos, Benitez Gimenez, Pablo, Algora del Valle, Carlos, Bett, Andreas W., Lackner, K., Niemeyer, M., Philipps, S. P., Siefer, Gerald, Ekins-Daukes, Ned, Roca, F., Cancro, C., Luque-Heredia, Ignacio, Warmuth, Werner, Baudrit, Mathieu, Okada, Y., Sugiyama, M., Hishikawa, Y., Takamoto, Tatsuya, Araki, Kenji, Fukuyama, A., Nishioka, K., Suzuki, H., Kuze, N., Moriyasu, Y., Kita, T., Kotagiri, Akira, Kojima, N., Martí Vega, Antonio, Yamaguchi, Masafumi, and Luque López, Antonio

Subjects
Telecomunicaciones
Abstract

Starting on June 2011, NGCPV has been the first coordinated project between the European Commission and Japanese NEDO in order to advance in the science and technology of concentrator photovoltaics (CPV). Research has covered all relevant areas in CPV, from solar cells to complete systems, including multijunction solar cells, novel solar cell concepts utilizing nanostructures, advanced optics and modules, thermal management, reliability and modeling at all the stages of the CPV chain, rating and round robin schemes and the development of characterization tools for cells, modules and systems (outdoor and indoor). Ending in November 2014, the NGCPV project has attained some remarkable results, such as the manufacturing of a 44.4% world record efficiency triple junction solar cell (by Sharp Corp.) and the development of a 15 kW CPV system (by Daido, BSQ and UPM) with a DC efficiency of 28% under CSOC, which is the highest reported in the world at system level. In this paper we summarize these and other relevant results concerning project activities such as the investigation of novel buffers for growing III-V materials on silicon, novel ~1eV materials for manufacturing quad-junction solar cells, the development of accurate models to forecast the electricity production in CPV plants and novel advanced optical designs for CPV modules, among others.

Published
2015

15. Spectrally-resolved measurement of concentrated light distributions for Fresnel lens concentrators

Author

Besson, Pierre, McVey White, Patrick, Domínguez Domínguez, César, Voarino, Philippe, García-Linares Fontes, Pablo, Lemiti, Mustapha, Schriemer, Henry, Hinzer, Karin, Baudrit, Mathieu, Besson, Pierre, McVey White, Patrick, Domínguez Domínguez, César, Voarino, Philippe, García-Linares Fontes, Pablo, Lemiti, Mustapha, Schriemer, Henry, Hinzer, Karin, and Baudrit, Mathieu

Abstract

A test method that measures spectrally resolved irradiance distribution for a concentrator photovoltaic (CPV) optical system is presented. In conjunction with electrical I-V curves, it is a means to visualize and characterize the effects of chromatic aberration and nonuniform flux profiles under controllable testing conditions. The indoor characterization test bench, METHOD (Measurement of Electrical, Thermal and Optical Devices), decouples the temperatures of the primary optical element (POE) and the cell allowing their respective effects on optical and electrical performance to be analysed. In varying the temperature of the POE, the effects on electrical efficiency, focal distance, spectral sensitivity, acceptance angle and multi-junction current matching profiles can be quantified. This work presents the calibration procedures to accurately image the spectral irradiance distribution of a CPV system and a study of system behavior over lens temperature.

Published
2016

16. CPVMatch - Concentrating photovoltaic modules using advanced technologies and cells for highest efficiencies

Author

Philipps, S. P., Baudrit, Mathieu, Hillerich, K., Moreau, A., Parmesani, R., Román, E., Sala Pano, Gabriel, Schineller, B., Timò, G., Bett, Andreas W., Philipps, S. P., Baudrit, Mathieu, Hillerich, K., Moreau, A., Parmesani, R., Román, E., Sala Pano, Gabriel, Schineller, B., Timò, G., and Bett, Andreas W.

Abstract

This paper presents the project Concentrating Photovoltaic modules using advanced technologies and cells for highest efficiencies (CPVMatch), which is funded from the European Union’s Horizon 2020 research and innovation programme. V multi-junction solar cells and CPV modules. Concerning cells, novel wafer bonded four-junction solar cells made of GaInP/GaAs//GaInAs/Ge are optimized with the target of reaching 48% efficiency under concentration at the end of the project. Moreover, multi-junction solar cell technologies with advanced materials - like ternary IV element mixtures (i.e. SiGeSn) and nanostructured anti-reflective coatings - are investigated. Concerning CPV modules the project focuses on both Fresnel-based and mirror-based technologies with a target efficiency of 40% under high concentrations beyond 800x. Achromatic Fresnel lenses for improved light management without secondary optics are investigated. In addition, smart, mirror-based HCPV modules are developed, which include a new mirror-based design, the integration of high efficiency, low cost DC/DC converters and an intelligent tracking sensor (PSD sensor) at module level. A profound life-cycle and environmental assessment and the development of adapted characterization methods of new multi-junction cells and HCPV modules complete the work plan of CPVMatch.

Published
2016

20. Rating of CPV modules: Results of module round robins

Author

Steiner, Marc, primary, Siefer, Gerald, additional, Baudrit, Mathieu, additional, Askins, Stephen, additional, Domínguez, César, additional, Antón, Ignacio, additional, Roca, Francesco, additional, Fucci, Raffaele, additional, Cancro, Carmine, additional, Romano, Antonio, additional, Graditi, Giorgio, additional, Pugliatti, Paola Maria, additional, Di Stefano, Agnese, additional, Kenny, Robert, additional, Norton, Matthew, additional, Minuto, Alessandro, additional, Morabito, Paolo, additional, Muller, Matthew, additional, Riley, Daniel, additional, and Pratt, Larry, additional

Published
2016
Full Text
View/download PDF

25. Distributed Simulation of Real Tunnel Junction Effects in Multi-Junction Solar Cells

Author

Espinet González, Pilar, García Vara, Iván, Rey-Stolle Prado, Ignacio, Algora del Valle, Carlos, and Baudrit, Mathieu

Subjects
Telecomunicaciones, Condensed Matter::Superconductivity, Energías Renovables, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Abstract

In this paper, we present an improved 3D distributed model that considers real operation regimes in a tunnel junction. This advanced method is able to accurately simulate the high concentrations at which the current in the solar cell surpasses the peak current of the tunnel junction. Simulations of dual-junction solar cells were carried out with different light profiles and including chromatic aberration to show the capabilities of the model. Such simulations show that, under some circumstances, the solar cell short circuit current may be slightly higher than the tunnel junction peak current without showing the characteristic dip in the J-V curve. This behavior is caused by the lateral current spreading towards the dark regions, which occurs through the anode region of the tunnel junction.

Published
2010

26. Modeling of GaInP/GaAs dual junction solar cells including tunnel junction

Author

Baudrit, Mathieu and Algora del Valle, Carlos

Subjects
Telecomunicaciones, Energías Renovables
Abstract

This paper presents research efforts conducted at the IES-UPM in the development of an accurate, physically-based solar cell model using the generalpurpose ATLASR device simulator by Silvaco. Unlike solar cell models based on a combination of discrete electrical components, this novel model extracts the electrical characteristics of a solar cell based on virtual fabrication of its physical structure, allowing for direct manipulation of materials, dimensions, and dopings. As single junction solar cells simulation was yet achieved, the next step towards advanced simulations of multi-junction cells (MJC) is the simulation of the tunnel diodes, which interconnect the subcells in a monolithic MJC. The first results simulating a Dual- Junction (DJ) GaInP/GaAs solar cells are shown in this paper including a complete Tunnel Junction (TJ) model and the resonant cavity effect occurring in the bottom cell. Simulation and experimental results were compared in order to test the accuracy of the models employed.

Published
2008

27. Electroluminescence characterization for III-V multi-junction solar cells

Author

Espinet González, Pilar, Algora del Valle, Carlos, Rey-Stolle Prado, Ignacio, García Vara, Iván, and Baudrit, Mathieu

Subjects
Energías Renovables, Física
Abstract

Characterization is a key process in attaining high efficiency in the state-of-the-art multi-junction solar cells. This work will summarize our efforts in using eletroluminescence for characterising multijunction solar cells. This study will present the possibilities of electroluminescence (EL) spectroscopy as a fast and simple characterization technique which is able to provide extensive information about the solar cell’s performance. Finally, four of the applications of this technique will be presented: band gap estimation, barrier effect for minority carriers, information on the thermal performance of encapsulated devices and determination of the shunt resistance of each cell in a dual junction device.

Published
2008

28. Lens and Backplate Temperatures Estimation from Simple Weather Measurements toward Condensation Impact on Energy Yield Evaluation.

Author

Cauwet, Thomas and Baudrit, Mathieu

Subjects
*STRUCTURAL plates, *LENSES, *TEMPERATURE effect, *CONDENSATION, *HUMIDITY, *THERMAL analysis
Abstract

Estimating lens and backplate temperatures is of high interest for many purposes such as energy yield estimations. This study presents a thermal model able to predict lens and backplate temperatures based on easily recordable data, namely global normal irradiance, ambient temperature, wind speed and relative humidity. The model has proved to deviate from actual measurement by about 1°C in average. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

29. CPVMatch - Concentrating Photovoltaic Modules Using Advanced Technologies and Cells for Highest Efficiencies.

Author

Philipps, Simon P., Baudrit, Mathieu, Hillerich, Karla, Moreau, Valentine, Parmesani, Rolando, Román, Eduardo, Sala, Gabriel, Schineller, Bernd, Timò, Gianluca, and Bett, Andreas W.

Subjects
*PHOTOVOLTAIC cells, *FRESNEL lenses, *ANTIREFLECTIVE coatings, *SOLAR concentrators, *ENERGY consumption
Abstract

This paper presents the project Concentrating Photovoltaic modules using advanced technologies and cells for highest efficiencies (CPVMatch), which is funded from the European Union's Horizon 2020 research and innovation programme. V multi-junction solar cells and CPV modules. Concerning cells, novel wafer bonded four-junction solar cells made of GaInP/GaAs//GaInAs/Ge are optimized with the target of reaching 48% efficiency under concentration at the end of the project. Moreover, multi-junction solar cell technologies with advanced materials - like ternary IV element mixtures (i.e. SiGeSn) and nanostructured anti-reflective coatings - are investigated. Concerning CPV modules the project focuses on both Fresnel-based and mirror-based technologies with a target efficiency of 40% under high concentrations beyond 800x. Achromatic Fresnel lenses for improved light management without secondary optics are investigated. In addition, smart, mirror-based HCPV modules are developed, which include a new mirror-based design, the integration of high efficiency, low cost DC/DC converters and an intelligent tracking sensor (PSD sensor) at module level. A profound life-cycle and environmental assessment and the development of adapted characterization methods of new multi-junction cells and HCPV modules complete the work plan of CPVMatch. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

30. Real Time Power Prediction Model for CPV Plants.

Author

Cauwet, Thomas, Roujol, Yannick, and Baudrit, Mathieu

Subjects
PHOTOVOLTAIC power systems, SOLAR power plants, EFFICIENCY of solar concentrators, PREDICTION models, HUMIDITY, SPECTRUM analysis
Abstract

Operating a CPV plant at its maximum efficiency to lower the cost of energy requires complete monitoring of the ambient and of the output parameters as well as a thorough method to detect failures as soon as they occur. This paper demonstrates the accuracy of a model for complete system output power prediction based on easily recordable data such as global normal irradiance, direct normal irradiance, spectral mismatch ratio, ambient temperature, wind speed and relative humidity. Over more than 50 days, the AC output energy of the tested plant has been predicted with an accuracy better than 2% and hourly predictions only show a deviation of 1.1%. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

31. Characterization of the Influence of Temperature on Achromatic Mirrors by Means of METHOD.

Author

Voarino, Philippe, Ritou, Arnaud, Weick, Clément, Garcia-Linares, Pablo, Besson, Pierre, and Baudrit, Mathieu

Subjects
ACHROMATISM, TEMPERATURE effect, REFRACTION (Optics), OPTICAL elements, MIRRORS
Abstract

Our characterization tool, called METHOD which was previously built for refractive optics [1], has been adapted and optimized to evaluate a mirror from the APOLLON Project [2], characterized in the framework of the European CPVMatch project. Influence of the glass box of the thermal chamber, homogeneity of the temperature across the sample, and influence of the chromatic light on the energetic spot's center are studied. We evaluate the mirror's abilities at different working temperatures and cell-to-primary optical element (POE) distances. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

32. Developing a Highly Integrated Receiverless Low Concentration Module with III-V Multijunction Cells.

Author

Weick, Clément, Garcia-Linares, Pablo, Voarino, Philippe, and Baudrit, Mathieu

Subjects
PHOTOVOLTAIC cells, SOLAR concentrators, MICROFABRICATION, SEMICONDUCTOR junctions, HEATING
Abstract

Concentrator photovoltaic (CPV) modules are composed of many components and interfaces and require complex fabrication processes, which in turn may cause lack of reliability. The presented work tackles these considerations, proposing an innovative highly integrated low concentration photovoltaic (LCPV) concept. The purpose is to develop a module with a high level of integration by lowering the number of components and interfaces. At first, the linear parabolic mirror, used as concentrator optics, can be considered as multifunctional, combining thermal, structural and optical functionalities. On this basis, the proposed CPV prototype design features a receiverless configuration, where the cells are directly arranged on the rear side of each mirror. Moreover, such implementation claims to demonstrate the applicability of reliable flat PV fabrication processes (such as lamination and cell interconnection) for the manufacturing of this LCPV module. Geometrical considerations, together with thermal and optical analyses are presented, in order to validate the concentrator design. Then, further prototyping aspects are discussed, including an overview of the manufacturing processes, materials selection and proposed procedures for the CPV module qualification and characterization. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

38. Extended description of tunnel junctions for distributed modeling of concentrator multi-junction solar cells

Author

Espinet González, Pilar, García Vara, Iván, Rey-Stolle Prado, Ignacio, Algora del Valle, Carlos, Baudrit, Mathieu, Espinet González, Pilar, García Vara, Iván, Rey-Stolle Prado, Ignacio, Algora del Valle, Carlos, and Baudrit, Mathieu

Abstract

One of the key components of highly efficient multi-junction concentrator solar cells is the tunnel junction interconnection. In this paper, an improved 3D distributed model is presented that considers real operation regimes in a tunnel junction. This advanced model is able to accurately simulate the operation of the solar cell at high concentraions at which the photogenerated current surpasses the peak current of the tunnel junctionl Simulations of dual-junction solar cells were carried out with the improved model to illustrate its capabilities and the results have been correlated with experimental data reported in the literature. These simulations show that under certain circumstances, the solar cells short circuit current may be slightly higher than the tunnel junction peak current without showing the characteristic dip in the J-V curve. This behavior is caused by the lateral current spreading toward dark regions, which occurs through the anode/p-barrier of the tunnel junction.

Published
2011

39. Theoretical optimization of GaInP/GaAs dual-junction solar cell: Toward a 36% efficiency at 1000 suns

Author

Baudrit, Mathieu, Algora del Valle, Carlos, Baudrit, Mathieu, and Algora del Valle, Carlos

Abstract

A theoretical conversion efficiency of 36.4% at 1000 suns concentration has been determined by means of realistic models and an improved optimization routine. The starting point device was the recent world-record monolithic GaInP/GaAs dual-junction solar cell that was grown lattice matched on a GaAs substrate by MOVPE, which has an efficiency of 32.6% at 1000 suns. Using previously calibrated models developed at our institution, IES-UPM, together with Silvaco ATLAS TCAD software, we reproduced the characteristics of the world-record solar cell, and then determined a cell configuration that would yield greater efficiency by using an optimization routine to hone the doping concentration and the thickness of each layer.

Published
2010

40. Tunnel diode modeling, including nonlocal trap-assisted tunneling: A focus on III-V multijunction solar cell simulation

Author

Baudrit, Mathieu, Algora del Valle, Carlos, Baudrit, Mathieu, and Algora del Valle, Carlos

Abstract

Multijunction solar cells (MJCs) based on III-V semiconductors constitute the state-of-the-art approach for high-efficiency solar energy conversion. These devices, consisting of a stack of various solar cells, are interconnected by tunnel diodes. Reliable simulations of the tunnel diode behavior are still a challenge for solar cell applications. In this paper, a complete description of the model implemented in Silvaco ATLAS is shown, demonstrating the importance of local and nonlocal trap-assisted tunneling. We also explain how the measured doping profile and the metalization-induced series resistance influence the behavior of the tunnel diodes. Finally, we detail the different components of the series resistance and show that this can help extract the experimental voltage drop experienced by an MJC due to the tunnel junction. The value of this intrinsic voltage is important for achieving high efficiencies at concentrations near 1000 suns.

Published
2010

41. SOPHIA CPV module round robin: Power rating at CSOC

Author

Siefer, Gerald, primary, Steiner, Marc, additional, Baudrit, Mathieu, additional, Dominguez, César, additional, Antón, Igancio, additional, Nuñez, Ruben, additional, Roca, Franco, additional, Pugliatti, Paola Maria, additional, Stefano, Agnese Di, additional, Kenny, Robert, additional, and Morabito, Paolo, additional

Published
2014
Full Text
View/download PDF

47. CPV-Specific Test Procedures For Evaluating On-Grid Inverters.

Author

Domínguez, César, Voarino, Philippe, Lazpita, Begoña, Bier, Anthony, Besson, Pierre, and Baudrit, Mathieu

Subjects
SOLAR concentrators, PHOTOVOLTAIC power generation, ELECTRIC power distribution grids, ELECTRIC inverters, DISTRIBUTION (Probability theory)
Abstract

A new protocol for testing on-grid inverters accounting for the operating conditions specific to CPV arrays is introduced. First, a CPV-specific weighted average for providing the static conversion efficiency according to typical frequency distributions of CPV yield throughout the year. Then, a set of representative scenarios for analyzing the dynamic MPPT efficiency of the inverter: slow ramp (clear sky), fast cloud passage, self-shading between arrays (typical of sunrise and sunset) and a wavering current response typical of imperfect tracking. The procedures have been applied to two different string-size inverters at the CEA inverter test bench, which have revealed strong differences in their dynamic MPPT efficiency. The CPV-specific weighted average proposed was found to provide lower performance figures than the classical European and CEC efficiencies for the two studied inverters. This protocol provides important information for CPV plant dimensioning and equipment selection, as the differences in performance revealed can result in significant deviation on the final energy yield. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

48. Contributions To Reproducible CPV Outdoor Power Ratings.

Author

Besson, Pierre, Domínguez, César, and Baudrit, Mathieu

Subjects
SOLAR concentrators, PHOTOVOLTAIC power generation, ELECTRIC power, MATHEMATICAL optimization, REGRESSION analysis
Abstract

Methodologies that aim to obtain a reproducible power rating are still under discussion at the WG7 of the IEC and there is a need for feedback from real field application in order to validate or improve these methods. These procedures are evaluated through the outdoor rating of seven modules from four different CPV technologies, which have been measured at the CEA outdoor monitoring bench at the Institut National de l'Energie Solaire (INES) site. The benefit of introducing other procedural considerations is analyzed, namely the inclusion of spectrally-corrected irradiance, the utilization of lens temperature as a new parameter for regressions and the optimization of dataset filtering. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results