Photoelectrochemical behavior of TiO₂ nanorod arrays decorated with CuInS₂ quantum dots

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• 作者：Zhuoyin Peng ; Yueli Liu ; Yinghan Zhao ; Keqiang Chen ; Valery Kovalev ; Wen Chen
• 关键词：TiO2 nanorod arrays ; Hydrothermal process ; CuInS2 quantum dots ; Assembly linking method ; Photoelectrochemical behavior
• 刊名：Applied Surface Science
• 出版年：15 February, 2014
• 年：2014
• 卷：292
• 期：Complete
• 页码：514-519
• 全文大小：2874 K

文摘

One-dimensional single crystalline TiO₂ nanorod arrays with different lengths were prepared by controlling the hydrothermal cycles, which were successfully sensitized with CuInS₂ quantum dots by assembly linking cycles, and their optical absorption properties and photoelectrochemical properties were investigated. 6 渭m-TiO₂ nanorod electrodes with the CuInS₂ quantum dots sensitization of three linking cycles had the best photoelectrochemical properties and short-circuit current density, such as the short-circuit current density are 27.3 times higher than that of pure 6 渭m-TiO₂ nanorod electrodes. The reason may be attributed to the suitable internal surface area of TiO₂ nanorod, with the increasing of the adsorption content of CuInS₂ quantum dots to generate much more photo-induce electrons. Moreover, it will also enhance the interface connection between TiO₂ nanorod and FTO conducting substrate, which favors to reduce the recombination of photo-induced electron-hole pairs.