Electron Distribution and Contact Interface Transfer Process in Bilayer TiO2 Films of Dye Sensitized Solar Cell

doi:10.7503/cjcu20120707

Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (12): 2697.doi: 10.7503/cjcu20120707

• Physical Chemistry • Previous Articles Next Articles

Electron Distribution and Contact Interface Transfer Process in Bilayer TiO₂ Films of Dye Sensitized Solar Cell

LIU Wei-Qing^1,2, LIANG Zhong-Guan¹, KOU Dong-Xing², HU Lin-Hua², DAI Song-Yuan²

1. Key Laboratory of Nondestructive Testing, Ministry of Education, School of the Testing and Photoelectric Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. Key Laboratory of Novel Thin Film Solar Cells, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received:2012-07-30 Online:2012-12-10 Published:2012-11-20

Abstract

Abstract:

The electron accumulation and transfer process at the nano/micro-scale bilayer structure of TiO₂ film were investigated by electrochemical impedance spectroscopy(EIS). Two kinds of films with different microstructures were prepared through adding a micro-scale TiO₂ layer at the top of the nano-scale monolayer TiO₂ film. The intrinsic properties of these films, such as the capacitance distribution, the density of electronic states, the electron transportation and the solid/liquid interfacial electron transfer process, were studied detailedly. The effect of the nano/micro-scale bilayer structure of TiO₂ film on dye sensitized solar cell(DSC) was analysed. Chemical capacitance increase caused by a certain number of electrons was accumulated in micro-scale TiO₂ layer. The electron transport resistance had no significant effect when adding a micro-scale TiO₂ layer. In addition to its good performance of light scattering, the material chemical capacitor and transfer resistance should be considered in selecting and preparing materials for DSC scattering layer.

Key words: Bilayer structure, Electron accumulation, Electron transfer, Dye sensitized solar cell

CLC Number:

O649.6

TrendMD:

LIU Wei-Qing, LIANG Zhong-Guan, KOU Dong-Xing, HU Lin-Hua, DAI Song-Yuan. Electron Distribution and Contact Interface Transfer Process in Bilayer TiO₂ Films of Dye Sensitized Solar Cell[J]. Chem. J. Chinese Universities, 2012, 33(12): 2697.

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Electron Distribution and Contact Interface Transfer Process in Bilayer TiO₂ Films of Dye Sensitized Solar Cell

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