Application of TiO2 Fusiform Nanorods for Dye-Sensitized Solar Cells with Significantly Improved Efficiency
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- 作者：Ke Fan ; Wei Zhang ; Tianyou Peng ; Junnian Chen ; Fan Yang
- 刊名：Journal of Physical Chemistry C
- 出版年：2011
- 出版时间：September 1, 2011
- 年：2011
- 卷：115
- 期：34
- 页码：17213-17219
- 全文大小：980K
- 年卷期：v.115,no.34(September 1, 2011)
- ISSN：1932-7455
文摘
Anatase TiO2 fusiform nanorods with diameters 20鈥?0 nm and lengths 200鈥?00 nm are synthesized by a two-step hydrothermal method, and the effects of the obtained TiO2 nanorod content in a P25-based electrode on the performances of dye-sensitized solar cell were investigated by using photocurrent鈥搗oltage, open-circuit voltage decay and electrochemical impedance spectroscopy measurements. The results show that those fusiform TiO2 nanorods in the P25-based electrode not only provide a straight path for the electron transport but also function as scattering particles to increase light harvesting efficiency of the solar cell, and the optimal conversion efficiency of 4.68% is obtained from a solar cell fabricated with a P25-based electrode containing 10 wt % nanorods, with a 66.5% improvement in the efficiency with lower resistance and longer electron lifetimes as compared to the bare P25-based solar cell. This should be attributed to the reduced charge recombination and the sufficient scattering effect of the nanorods in the film electrode.