Topotactically Grown Bismuth Sulfide Network Film on Substrate as Low-Cost Counter Electrodes for Quantum Dot-Sensitized Solar Cells

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• 作者：Haijing Yu ; Huili Bao ; Ke Zhao ; Zhonglin Du ; Hua Zhang ; Xinhua Zhong
• 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：16602-16610
• 全文大小：545K
• ISSN：1932-7455

文摘

Bi₂S₃ films consisting of two-dimensional interconnected Bi₂S₃ single-crystalline nanorod networks have been fabricated on a F:SnO₂ (FTO) glass substrate through the formation of intermediate BiOI nanosheets from layer-structured BiI₃ by chemical vapor deposition and subsequent hydrothermal transformation into Bi₂S₃ networks. A continuous lattice and structure-directed topotactic transformation mechanism is supposed for the formation of Bi₂S₃ network film. The prepared Bi₂S₃/FTO films were employed as counter electrode (CE) for CdSe quantum dot-sensitized solar cells for the first time and showed better photovoltaic performance than that from the convenient Pt CE. The influence of the preparation conditions for Bi₂S₃/FTO films on the resulting solar cell performance was systematically investigated and optimized with use of J鈥揤 curves, scanning electron microscopy (SEM), UV鈥搗is absorption, and electrochemical impedance spectroscopy. To further improve the cell device efficiency, the modification of the Bi₂S₃ network CE with metal particles was also studied.