A Numerical Simulation and Impedance Study of the Electron Transport and Recombination in Binder-Free TiO2 Film for Flexible Dye-Sensitized Solar Cells
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- 作者：Xin Li ; Hong Lin ; Jianbao Li ; Xiaxi Li ; Bai Cui ; Luozheng Zhang
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：September 4, 2008
- 年：2008
- 卷：112
- 期：35
- 页码：13744-13753
- 全文大小：383K
- 年卷期：v.112,no.35(September 4, 2008)
- ISSN：1932-7455
文摘
A mesoporous TiO2 film consisting of different size nanocrystal particles without any organic binder was prepared on a conductive indium−tin oxide (ITO)-coated polyethylene naphthalate (PEN) plastic sheet by the doctor-blade method to fabricate flexible dye-sensitized photoanodes at 120 °C. It was found that the structure of the film affected the photovoltaic performance of the photoanode greatly. The mechanism of such effects was investigated both by simulation of porosity, surface area, average pore size, and electron diffusion coefficient of the mesoporous TiO2 film, and by impedance study for the electron transport and recombination in a dye-sensitized solar cell (DSC). The results showed that the electron transport and recombination dominated the operation of the DSC with such flexible photoanodes. The optimum photoanode was achieved, and the largest conversion efficiency obtained was 3.93%.