Efficiency Improvement of Single-Junction In0.5Ga0.5P Solar Cell with Compositional Grading p-Emitter/Window Capping Configuration

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概要

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• In this study a novel p-emitter/window capping configuration design applied to a p+–n In0.5Ga0.5P solar cell is developed. By grading the Ga and Al compositions in the interface between the p-In0.5Ga0.5P emitter and p-In0.5Al0.5P window layers, the output characteristics of the p+–n In0.5Ga0.5P solar cell are improved. It is found that the photoluminescence (PL) intensity is increased and the minority carrier lifetime obtained from room-temperature time-resolved (TR) PL measurement can be increased from 5.3 ns of the typical design to 7.0 ns, indicating that the application of compositional grading can improve crystal quality and the interface becomes smoother, thus reducing the nonradiative recombination losses. Both the short-circuit current and open-circuit voltage are increased correspondingly and the conversion efficiency is improved from 14.57% of the typical design to 15.32% of the new p-emitter/window configuration under one-sun air-mass 1.5 global illumination.

• 2010-12-25

著者

• Kuo Hao-chung

  Department Of Photonic And Institute Of Electro-optical Engineering National Chiao Tung University

• Lu Tien-chang

  Department Of Photonics And Institute Of Electro-optical Engineering National Chiao Tung University

• Wang Shing-chung

  Department Of Photonic And Institute Of Electro-optical Engineering National Chiao Tung University

• Lai Fang-i

  Department Of Electrical Engineering Yuan Ze University

• Kuo Shou-Yi

  Department of Electronic Engineering, Green Technology Research Center, Chang Gung University, Taoyuan 333, Taiwan

• Wang Shing-Chung

  Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 300, Taiwan

• Chang Yi-An

  Millennium Communication Co., Ltd., Hsinchu 303, Taiwan

• Laih Li-Wen

  Millennium Communication Co., Ltd., Hsinchu 303, Taiwan

• Laih Li-Hong

  Millennium Communication Co., Ltd., Hsinchu 303, Taiwan

• Lai Fang-I

  Department of Photonics Engineering, Yuan Ze University, Taoyuan 320, Taiwan

• Lu Tien-Chang

  Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 300, Taiwan

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