Introducing an Intermediate Band into Dye-Sensitized Solar Cells by W6+ Doping into TiO2 Nanocrystalline Photoanodes

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• 作者：Zhengfu Tong ; Tao Peng ; Weiwei Sun ; Wei Liu ; Shishang Guo ; Xing-Zhong Zhao
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：July 31, 2014
• 年：2014
• 卷：118
• 期：30
• 页码：16892-16895
• 全文大小：256K
• ISSN：1932-7455

文摘

The novel concept of introducing intermediate band into the mesoporous TiO₂ backbone of dye-sensitized solar cells (DSSCs) is proposed to take full advantage of the sunlight and enhance the power conversion efficiency. Nominal trace amount W-doped TiO₂ nanocrystralline films were prepared with the purpose of forming intermediate band in the bandgap of TiO₂. A notable improvement of the device performance was obtained when N-type W-doped TiO₂ films were applied as the photoanode of DSSCs. The short-circuit current density (J_sc) increased from 12.40 mA cm^鈥? to 15.10 mA cm^鈥?, and the conversion efficiency increased from 6.64 to 7.42% when nominal 50 ppm (ppm) W-doped TiO₂ was adopted.