Electrochemical impedance spectroscopy analysis on the dye-sensitized solar cell with different TiO2 thicknesses

Hee Je Kim, Jeong Gee Lee, Hyunwoong Seo, Min Kyu Son, Jin Kyoung Kim, K. Prabakar, Inyoung Shin

Research output: Contribution to journalArticle

Abstract

Dye-sensitized solar cell(DSC) is composed of a dye-adsorbed nanoporous TiO2 layer on fluorine-doped tin oxide(FTO) glass substrate, electrolyte, and platinium doped counter electrode. Among these, a dye-absorbed nanoporous TiO2 layer plays an important role in the performance of the DSC because the injected electrons from excited dye molecules move through this layer. And the condition of TiO2 layer such as the morphology and thickness affects on the electron movement. Therefore, the performances and the efficiency of DSC change as the thickness of TiO2 layer is different. Electrochemical Impedance Spectroscopy(EIS) is the powerful analysis method to study the kinetics of electrochemical and photoelectrochemical processes occurring in the DSC especially the injected electron movements. So we analyzed the DSCs with different TiO2 thicknesses by using EIS to understand the influence of the TiO2 thickness to the performance of the DSC clearly. Finally, we got the EIS analysis on the DSC with different TiO2 thickness from the internal resistance of the DSC, the electron life time and the amount of dye molecules.

Original languageEnglish
Pages (from-to)2425-2430
Number of pages6
JournalTransactions of the Korean Institute of Electrical Engineers
Volume58
Issue number12
Publication statusPublished - Dec 1 2009

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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