通过氮掺杂纳米晶二氧化钛电极提高染料敏化太阳能电池的光电转换效率

Enhancing the photoelectric conversion of dye-sensitized solar cell via nitrogen-doped nanocrystalline titania electrode.

作者信息

Cheng Ping, Lan Tian, Yang Haijun, Wang Wanjun, Wu Haixia, Deng Changsheng, Dai Xiaming, Guo Shouwu

机构信息

National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

出版信息

J Nanosci Nanotechnol. 2010 Nov;10(11):7698-702. doi: 10.1166/jnn.2010.2788.

DOI:10.1166/jnn.2010.2788

PMID:21138013

Abstract

A high efficient dye-sensitized solar cell (DSC) was fabricated using nitrogen-doped nanocrystalline titania(TiO2) photoanode. X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), X-ray powder diffraction (XRD), zeta potentials, nitrogen adsorption-desorption and elemental analysis experiments were employed to characterize the nitrogen-doped nanocrystalline TiO2 photoanode. An obvious enhancement of the optical absorption in the range of 380-550 nm was observed for nitrogen-doped TiO2, which was attributed to both the substitutional N and the chemisorbed N2 molecules. A conversion efficiency of 9.04% was obtained on the DSC based on nitrogen-doped TiO2 photoanode annealed in a flow of NH3 at 550 degrees C, with an increase of 15.6% improvement in comparison with pure TiO2 (7.82%). The mechanism for the enhanced photovoltaic performance was discussed.

摘要

采用氮掺杂纳米晶二氧化钛（TiO₂）光阳极制备了一种高效染料敏化太阳能电池（DSC）。利用X射线光电子能谱（XPS）、漫反射光谱（DRS）、X射线粉末衍射（XRD）、zeta电位、氮吸附-脱附和元素分析实验对氮掺杂纳米晶TiO₂光阳极进行了表征。氮掺杂TiO₂在380-550nm范围内的光吸收明显增强，这归因于取代N和化学吸附的N₂分子。基于在550℃的NH₃气流中退火的氮掺杂TiO₂光阳极的DSC获得了9.04%的转换效率，与纯TiO₂（7.82%）相比提高了15.6%。讨论了光伏性能增强的机制。