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Research on the electron transport and back-reaction kinetics in TiO2 films applied in dye-sensitized solar cells

Liang Lin-Yun Dai Song-Yuan Fang Xia-Qin Hu Lin-Hua

Research on the electron transport and back-reaction kinetics in TiO2 films applied in dye-sensitized solar cells

Liang Lin-Yun, Dai Song-Yuan, Fang Xia-Qin, Hu Lin-Hua
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  • Received Date:  13 March 2007
  • Accepted Date:  13 July 2007
  • Published Online:  20 March 2008

Research on the electron transport and back-reaction kinetics in TiO2 films applied in dye-sensitized solar cells

  • 1. 中国科学院等离子体物理研究所太阳能材料与工程研究室,合肥 230031

Abstract: The mechanics of electron transport and properties of back-reaction kinetics were investigated by intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS). The theoretical expression fitting the experimental data of five different porous TiO2 films applied in DSC and the values of absorption coefficient (α),the diffusion coefficient (Dn),electron lifetime (τn),the electron transit time (τd) and IPCE can be obtained. The results showed that the electrons transit faster in the thinner films,while the electron concentration increase in the thicker films. The influence of film thickness on the electron generation,transport and recombination processes was investigated in the microscopic level in this paper.

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