Enhanced charge generation and transfer performance of the conical bamboo-like TiO2 nanotube arrays photo-electrodes in quantum dot sensitized solar cells
Enhanced charge generation and transfer performance of the conical bamboo-like TiO2 nanotube arrays photo-electrodes in quantum dot sensitized solar cells
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量子点敏化太阳能电池中锥形竹状二氧化钛纳米管阵列光电极增强的电荷产生和传输性能
DOI：
10.1016/j.solener.2020.05.026
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发表时间：
2020-07
期刊：
影响因子：
6.7
通讯作者：
Chen Keqiang
中科院分区：
文献类型：
--
作者：
Peng Zhuoyin;Sun Zheng;Chen Jianlin;Li Wei;Chen Jian;Liu Yueli;Chen Keqiang
Conical bamboo-like TiO2nanotubes (NTs) electrodes, instead of the traditional TiO2NTs and conical TiO2NTs electrodes, are employed as the photo-electrodes for the fabrication of CuInS2quantum dot sensitized solar cells (QDSSCs), which have improved deposition content of QDs in solar cells. The distances between each bamboo ring are modulated by the different anodization holding times. In addition, the optical properties of different TiO2NTs electrodes and CuInS2quantum dots sensitized photo-electrodes are investigated, which reveals that the deposition content of QDs have been improved by the bamboo rings of conical bamboo-like TiO2NTs based photo-electrodes to obtain better optical absorption property and charge separation property. More importantly, the bamboo rings in the conical bamboo-like TiO2NTs structure can provide more paths for the charge transfer, which results in improved charge transfer rate in the QDSSCs. Finally, the optimized conical bamboo-like TiO2NTs prepared by anodization holding time of 20 min exhibits higher current density, which leads to a significant increasing of the photovoltaic conversion efficiency from 4.65% to 5.98%.
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