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144 results on '"Chen, Jing-De"'

3. Simultaneously Improved Efficiency and Stability in All-Polymer Solar Cells by a P–i–N Architecture

Author

Xu, Yalong, Yuan, Jianyu, Liang, Shuyan, Chen, Jing-De, Xia, Yuxin, Larson, Bryon W, Wang, Yusheng, Su, Gregory M, Zhang, Yannan, Cui, Chaohua, Wang, Ming, Zhao, Haibin, and Ma, Wanli

Subjects
Affordable and Clean Energy
Abstract

All-polymer organic solar cells offer exceptional stability. Unfortunately, the use of bulk heterojunction (BHJ) structure has the intrinsic challenge to control the side-chain entanglement and backbone orientation to achieve sophisticated phase separation in all-polymer blends. Here, we revealed that the P-i-N structure can outperform the BHJ ones with a nearly 50% efficiency improvement, reaching a power conversion efficiency approaching 10%. This P-i-N structure can also provide an enhanced internal electric field and remarkably stable morphology under harsh thermal stress. We have further demonstrated generality of the P-i-N structure in several other all-polymer systems. Considering the adjustable polymer molecular weight and solubility, the P-i-N device structure can be more beneficial for all-polymer systems. With the design of more crystalline polymers, the antiquated P-i-N structure can further show its strength in all-polymer systems by simplified morphology control and improved carrier extraction, becoming a more favorite device structure than the dominant BHJ structure.

Published
2019

5. Optically Enhanced Semitransparent Organic Solar Cells with Light Utilization Efficiency Surpassing 5.5%.

Author

Zhang, Ye‐Fan, Chen, Wei‐Shuo, Chen, Jing‐De, Ren, Hao, Hou, Hong‐Yi, Tian, Shuo, Ge, Heng‐Ru, Ling, Hong‐Hui, Zhang, Jia‐Liang, Mao, Hongying, Tang, Jian‐Xin, and Li, Yan‐Qing

Subjects
SOLAR cells, BUILDING-integrated photovoltaic systems, THIN films, OPTICAL reflection, PHOTOVOLTAIC power generation
Abstract

Converting non‐visual light into photocurrent while maintaining high visual transparency is vital for semitransparent organic solar cells (ST‐OSCs) application, yet often challenging over insufficient invisible light‐harvesting. Herein, spectrally selective optical manipulation for ST‐OSCs with high visual light transparency and full‐spectral non‐visual light reflection is proposed by matching the optical admittance of ultrathin Ag films using ZnS and MgF2. The reflection of optically enhanced ST‐OSCs at the spectral region beyond the human eye's response spectrum is improved and the transmission in the visual region is simultaneously enhanced. By further integrating an anti‐reflective structure, the optimal structure boosts the average visible transmittance and power conversion efficiency of ST‐OSCs to 44.3% and 12.6%, respectively, yielding a record light utilization efficiency of 5.6%. Corresponding flexible ST‐OSCs with high mechanical stability implies that this work provides a facile and universal strategy for ST‐OSCs aiming at building integrated photovoltaics. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Spectrally Selective Hole Extraction Structure Enables a Self‐Powered Perovskite Solar‐Blind Photodetector with Record Responsivity and Detectivity.

Author

Hou, Hong‐Yi, Tian, Shuo, Chen, Jing‐De, Ling, Hong‐Hui, Ren, Hao, Zhang, Ye‐Fan, Ge, Heng‐Ru, Chen, Wei‐Shuo, Li, Yan‐Qing, Mao, Hongying, Ishii, Hisao, and Tang, Jian‐Xin

Subjects
PHOTODETECTORS, PROJECTILES, FLAME, PEROVSKITE, ABSORPTION
Abstract

Photodiode‐type solar‐blind photodetectors (SBPDs) with the self‐powered feature hold great promise for applications in unattended secure communication, flame detection, and missile warning. However, the responsivity of SBPDs is usually limited due to the severe solar‐blind (SB) light extinction in substrates and charge transport layers. Herein, a spectrally selective hole extraction structure (SHE) is proposed for high‐efficiency perovskite SBPDs. The SHE consisting of a tandem Fabry–Perot cavity and energy‐level‐matched hole transport layer endows the device with narrowband absorption in the SB region and optimized charge extraction capability from the CsPbI2Br perovskite. The optimized SHE exhibits a peak transmittance of 27% at 255 nm and a half maximum at full width of 28 nm. Under SB light illumination, the champion device achieves a responsivity of 56.20 mA W−1 and a detectivity (D*) of 2.86 × 1013 Jones, which are the record values among the reported results. The approach demonstrated here paves the way for the optical and electrical design of perovskite photodetectors with spectrally selective detection. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Regulating Charge Carrier Recombination in the Interconnecting Layer to Boost the Efficiency and Stability of Monolithic Perovskite/Organic Tandem Solar Cells

Author

Yang, Haidi, primary, Chen, Weijie, additional, Yu, Yuan, additional, Shen, Yunxiu, additional, Yang, Heyi, additional, Li, Xinqi, additional, Zhang, Ben, additional, Chen, Haiyang, additional, Cheng, Qinrong, additional, Zhang, Zhichao, additional, Qin, Wei, additional, Chen, Jing‐De, additional, Tang, Jian‐Xin, additional, Li, Yaowen, additional, and Li, Yongfang, additional

Published
2022
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16. Absorption Spectrum‐Compensating Configuration Reduces the Energy Loss of Nonfullerene Organic Solar Cells.

Author

Ren, Hao, Ma, Yunlong, Liu, Hui‐Min, Chen, Jing‐De, Zhang, Ye‐Fan, Hou, Hong‐Yi, Li, Yan‐Qing, Zheng, Qingdong, and Tang, Jian‐Xin

Subjects
ENERGY dissipation, PHOTOVOLTAIC power systems, POLARITONS, SOLAR spectra, SOLAR cells, ABSORPTION, ABSORPTION spectra, ELECTRON energy loss spectroscopy
Abstract

Using narrow bandgap nonfullerene acceptors (NFAs) can broaden the absorption spectrum of organic solar cells (OSCs) to the near‐infrared region. However, the simultaneously decreased extinction coefficient of the active layer at the blue region results in inevitable light escaping and energy loss. Herein, a blazed grating‐based device configuration consisting of a patterned rear electrode is employed to compensate for the low absorption of nonfullerene OSCs. Experimental results reveal that the normal incidence light, especially blue light, that bounces off the patterned rear electrode is concentrated in a large tilted angle and subsequently trapped in waveguide mode. Along with the excitation of surface plasmon polariton, the structured nonfullerene OSCs using a new‐designed PM6:M36 active layer obtain the broadband absorption enhancement with 1.5 times increase at the blue region. The optimized device achieves an 8.95% increase in photocurrent and a champion power conversion efficiency of approaching 18%, which is the highest reported value among all the devices based on A‐D‐A type NFAs. [ABSTRACT FROM AUTHOR]

Published
2022
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17. Biomimetic Electrodes for Flexible Organic Solar Cells with Efficiencies over 16%

Author

Qu, Tian‐Yi, primary, Zuo, Li‐Jian, additional, Chen, Jing‐De, additional, Shi, Xueliang, additional, Zhang, Ting, additional, Li, Ling, additional, Shen, Kong‐Chao, additional, Ren, Hao, additional, Wang, Shu, additional, Xie, Feng‐Ming, additional, Li, Yan‐Qing, additional, Jen, Alex K.‐Y., additional, and Tang, Jian‐Xin, additional

Published
2020
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20. Uniform Stepped Interfacial Energy Level Structure Boosts Efficiency and Stability of CsPbI2Br Solar Cells.

Author

Luo, Yu‐Xin, Xie, Feng‐Ming, Chen, Jing‐De, Ren, Hao, Wang, Jing‐Kun, Cai, Xiao‐Yi, Shen, Kong‐Chao, Lu, Lin‐Yang, Li, Yan‐Qing, Luponosov, Yuriy N., and Tang, Jian‐Xin

Subjects
SOLAR cells, PHOTOVOLTAIC power systems, ENERGY dissipation, OPEN-circuit voltage, THERMAL resistance, PRODUCTION sharing contracts (Oil & gas)
Abstract

All‐inorganic CsPbI2Br perovskite has attracted great attention as an absorber for perovskite solar cells (PSCs) due to its excellent thermal and light resistance. However, its device performance is restricted by the large energy level offset between CsPbI2Br and the most commonly used hole‐transporting layer (HTL). Herein, multicarbazolyl‐substituted benzonitrile (4t‐5CzBn) is inserted into the interface between CsPbI2Br and HTL to form a uniform stepped (0.24 eV) interfacial energy level structure, which reduces the energy loss and boosts the hole extraction of CsPbI2Br PSCs. The incorporation of 4t‐5CzBn induces the increase in open‐circuit voltage and fill factor from 1.256 V and 74.5% to 1.335 V and 82.3%, respectively. The optimized device achieves a power conversion efficiency of 17.34%, which is among the highest reported values of CsPbI2Br PSCs. Besides the energy level tuning effect, the tert‐butyl groups in 4t‐5CzBn improve the moisture‐resistance of CsPbI2Br PSCs. The unencapsulated device maintains over 75% of its initial efficiency after 700 h storage in air. These results demonstrate that the rational tuned energy level step benefits the performance improvement of CsPbI2Br PSCs. [ABSTRACT FROM AUTHOR]

Published
2021
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30. Recent Progress in Organic Photodetectors and their Applications.

Author

Ren, Hao, Chen, Jing‐De, Li, Yan‐Qing, and Tang, Jian‐Xin

Subjects
*PHOTODETECTORS, *OPTOELECTRONICS, *OPTOELECTRONIC devices, *PHOTOTRANSISTORS
Abstract

Organic photodetectors (OPDs) have attracted continuous attention due to their outstanding advantages, such as tunability of detecting wavelength, low‐cost manufacturing, compatibility with lightweight and flexible devices, as well as ease of processing. Enormous efforts on performance improvement and application of OPDs have been devoted in the past decades. In this Review, recent advances in device architectures and operation mechanisms of phototransistor, photoconductor, and photodiode based OPDs are reviewed with a focus on the strategies aiming at performance improvement. The application of OPDs in spectrally selective detection, wearable devices, and integrated optoelectronics are also discussed. Furthermore, some future prospects on the research challenges and new opportunities of OPDs are covered. [ABSTRACT FROM AUTHOR]

Published
2021
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32. Balanced Partnership between Donor and Acceptor Components in Nonfullerene Organic Solar Cells with >12% Efficiency

Author

Lin, Yuze, primary, Zhao, Fuwen, additional, Prasad, Shyamal K. K., additional, Chen, Jing‐De, additional, Cai, Wanzhu, additional, Zhang, Qianqian, additional, Chen, Kai, additional, Wu, Yang, additional, Ma, Wei, additional, Gao, Feng, additional, Tang, Jian‐Xin, additional, Wang, Chunru, additional, You, Wei, additional, Hodgkiss, Justin M., additional, and Zhan, Xiaowei, additional

Published
2018
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