Efficiency enhancement of TiO₂ nanodendrite array electrodes in CuInS₂ quantum dot sensitized solar cells

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• 作者：Zhuoyin Peng ; Yueli Liu ; Yinghan Zhao ; Wei Shu ; Keqiang Chen ; Qiaoliang Bao ; Wen Chen
• 关键词：TiO2 nanodendrite arrays ; CuInS2 quantum dots ; Electron injection ; Efficiency enhancement
• 刊名：Electrochimica Acta
• 出版年：30 November, 2013
• 年：2013
• 卷：111
• 期：Complete
• 页码：755-761
• 全文大小：2410 K

文摘

Single crystal three-dimensional TiO₂ nanodendrite arrays were prepared by a hydrothermal process, which were successfully sensitized with CuInS₂ quantum dots as photo-anodes to fabricate the solar cells. The UV-vis absorption and photoluminescence spectra observe that the TiO₂ nanodendrite based photo-anode structures are more efficient to improve the optical absorption properties and electron-hole separation. Electrochemical impedance spectra and photoluminescence decay analysis indicate that the TiO₂ nanodendrite based solar cells structure have higher electron injection rate. Under full sunlight illumination, the CuInS₂ quantum dot sensitized TiO₂ nanodendrite arrays exhibit a photovoltaic power conversion efficiency of 1.26%, which has great improvement of J_SC comparing with that of CuInS₂ quantum dot sensitized with TiO₂ nanoparticles and nanorods.