Mechanisms of Electron Transfer and Dynamic Process at the Multiphase Interface in Dye Sensitized Solar Cell

doi:10.3969/j.issn.0251-0790.2012.09.031

Abstract

Abstract:

The multiphase complex interface made up of the transparent conductive oxide substrate(TCO), nano-porous TiO₂ film and electrolyte was formed at the substrate of the anode in dye sensitized solar cell(DSC). The mechanisms of electron transfer and dynamic process at this multiphase complex interface were investigated by electrochemical impedance spectroscopy(EIS). The multiphase interface structure was simplified by an insulating layer which electropolymerized on the exposed TCO. According to changes of the contact interface structure and electron transfer pathway, the corresponding equivalent circuits were constructed. The interface electron transfer mechanism was analyzed and the electron transfer kinetic constants for the electron transfer across the main contact interfacial were obtained at different bias. The results show that different mechanism of interfacial electron transfer and kinetics process can be distinguished by adjusting the bias and simplifying the multiphase interface structure.

Key words: Dye sensitized, Solar cell, Multiphase interface, Electron transfer mechanism, Dynamic process

CLC Number:

O649.6

TrendMD:

LIU Wei-Qing, KOU Dong-Xing, HU Lin-Hua, DAI Song-Yuan. Mechanisms of Electron Transfer and Dynamic Process at the Multiphase Interface in Dye Sensitized Solar Cell[J]. Chem. J. Chinese Universities, 2012, 33(09): 2051.

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