中国物理B ›› 2011, Vol. 20 ›› Issue (5): 57302-057302.doi: 10.1088/1674-1056/20/5/057302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Photovoltage analysis of a heterojunction solar cell

熊超, 姚若河, 耿魁伟   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China
  • 收稿日期:2010-07-10 修回日期:2010-12-23 出版日期:2011-05-15 发布日期:2011-05-15

Photovoltage analysis of a heterojunction solar cell

Xiong Chao(熊超), Yao Ruo-He(姚若河)†, and Geng Kui-Wei(耿魁伟)   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China
  • Received:2010-07-10 Revised:2010-12-23 Online:2011-05-15 Published:2011-05-15

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摘要： According to the p–n junction model of Shockley, the relationship between the equilibrium carrier concentrations of n-type and p-type semiconductors on the edges of the depletion region of a p–n junction solar cell is analysed. The calculation results show that the photovoltage can exceed the built-in voltage for a special kind of heterojunction solar cell. When the photovoltage exceeds the built-in voltage under illumination, the dark current and the photocurrent are impeded by the peak of voltage barrier at the interface and the expression of the total I–V characteristic is given.

Abstract: According to the p–n junction model of Shockley, the relationship between the equilibrium carrier concentrations of n-type and p-type semiconductors on the edges of the depletion region of a p–n junction solar cell is analysed. The calculation results show that the photovoltage can exceed the built-in voltage for a special kind of heterojunction solar cell. When the photovoltage exceeds the built-in voltage under illumination, the dark current and the photocurrent are impeded by the peak of voltage barrier at the interface and the expression of the total I–V characteristic is given.

Key words: solar cells, built-in voltage, photovoltage, heterojunction

中图分类号:  (Electronic transport in interface structures)

  • 73.40.-c
73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 88.40.H- (Solar cells (photovoltaics)) 88.40.J- (Types of solar cells)