Electrophoretic deposition of TiO2 film on titanium foil for a flexible dye-sensitized solar cell

Hsin Wei Chen, Kuan Chieh Huang, Chih Yu Hsu, Chia Yu Lin, Jian Ging Chen, Chuan Pei Lee, Lu Yin Lin, R. Vittal, Kuo Chuan Ho

研究成果: Article同行評審

42 引文 斯高帕斯(Scopus)

摘要

Electrophoretic deposition (EPD) method is employed to obtain mesoporous TiO2 film on a titanium (Ti) foil; the film is then mechanically compressed and sintered at 350 °C before being subjected to dyeing. A comprehensive study was made on the mechanistic aspects of the EPD process. The dye-sensitized solar cell (DSSC) using the thus formed TiO2 film rendered a power conversion efficiency (Eff.) of 6.5%. Effects of various compression pressures on the photovoltaic parameters and on other characteristic parameters of the pertinent DSSCs are studied. Electrochemical impedance spectroscopy (EIS) is applied for the first time, using a novel equivalent model, to study the impedance behavior of the DSSC with this type of TiO 2 film. We also obtain characteristic parameters of the TiO 2 photoanode by using EIS. The coordination number of the TiO 2 film, and the ratio of charge transfer resistances of electron recombination and electron transport are also obtained and analyzed. Moreover, we employ a multilayer approach and increase the film thickness to prepare TiO2 films with the same coordination number and porosity; DSSCs using such TiO2 films obtained from P90 and P25 rendered efficiencies of 6.5% and 5.24%, respectively. Scanning electron microscopy (SEM) micrographs are obtained to characterize the TiO2 films formed by the EPD technique and laser-induced transient technique is used to estimate the electron lifetime in the TiO2 films.

原文English
頁(從 - 到)7991-7998
頁數8
期刊Electrochimica Acta
56
發行號23
DOIs
出版狀態Published - 2011 九月 30

All Science Journal Classification (ASJC) codes

  • 化學工程 (全部)
  • 電化學

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