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Electron transport in solid-state dye-sensitized solar cells based on polyaniline

Liang Lin-Yun Chen Chong Wang Kong-Jia Wang Ming-Tai Guo Li Kong Ming-Guang

Electron transport in solid-state dye-sensitized solar cells based on polyaniline

Liang Lin-Yun, Chen Chong, Wang Kong-Jia, Wang Ming-Tai, Guo Li, Kong Ming-Guang
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  • Abstract views:  3875
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  • Received Date:  18 August 2006
  • Accepted Date:  07 December 2006
  • Published Online:  20 July 2007

Electron transport in solid-state dye-sensitized solar cells based on polyaniline

  • 1. (1)中国科学院等离子体物理研究所,合肥 230031; (2)中国科学院等离子体物理研究所,合肥 230031;安徽建筑工业学院材料科学与工程系,合肥 230022; (3)中国科学院等离子体物理研究所,合肥 230031;中国人民解放军徐州空军学院,徐州 221000; (4)中国科学院固体物理研究所,合肥 230031

Abstract: Solid-state dye-sensitized solar cells (DSCs) were prepared using polaniline (PANI) as hole- transport material. The charge transport and recombination in the cells were studied by means of intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated photovoltage spectroscopy (IMVS). On the basis of lifetime (τn) and mean transit time (τd) of the electrons in nanoporous TiO2 film and fitting of the IMPS response, the effective diffusion coefficient (Dn) and the diffusion length (Ln) of electrons in the TiO2 film were acquired. The electron lifetime in the PANI-based DSCs was about 10 times lower than their liquid counterparts, indicating a much more serious recombination of photogenerated electrons in the TiO2 film, very likely mainly with holes of oxidized dye molecules. With increase in the thickness of TiO2 film, both τn and τd decreased, whereas Ln and Dn increased; and the better performance of the solid-state cells was available only in a suitable thickness range of TiO2 films.

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