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Effect of light path folding on the properties of electron transport in dyesensitized solar cell

Liu Wei-Qing Kou Dong-Xing Hu Lin-Hua Dai Song-Yuan

Effect of light path folding on the properties of electron transport in dyesensitized solar cell

Liu Wei-Qing, Kou Dong-Xing, Hu Lin-Hua, Dai Song-Yuan
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  • Received Date:  24 December 2011
  • Accepted Date:  11 January 2012
  • Published Online:  20 August 2012

Effect of light path folding on the properties of electron transport in dyesensitized solar cell

  • 1. Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
  • 2. Key Laboratory of Nondestructive Testing of Ministry of Education, School of the Testing and Photoeletric Enginering, Nanchang Hangkong University, Nanchang 330063, China
Fund Project:  Project supported by the National Basic Research Program of China (Grant No. 2011CBA00700), the National High Technology Research and Development Program of China (Grant No. 2009AA050603), the Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences (Grant No. KGCX2-YW-326), and the China Postdoctoral Science Foundation (Grant No. 20110490835).

Abstract: In this paper, an electron continuity equation with light path folding is developed based on the reflection structure of photoanode in a dye sensitized solar cell (DSC). The characteristics of modulated photocurrent frequency response are calculated, and the effects of light path folding on electron transport property are studied under different absorption and reflection conditions. Intensity modulated photocurrent spectroscopy measurements show that the established model reflectes the actual characteristic of the response to modulated photocurrent frequency when the light path is folded inside the DSC. The kinetic of electron transfer process depends on the light absorption coefficient, film thickness and large particle reflection ability and other factors in DSC with reflector structure. The deep trap is filled and residence time of electron in trap is shortened. It is attributed to the fact that the light path folding reduces the effect of trap/detrap and accelerates the electron transportation.

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