3D Cu-doped CoS porous nanosheet films as superior counterelectrodes for quantum dot-sensitized solar cells

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题名:	3D Cu-doped CoS porous nanosheet films as superior counterelectrodes for quantum dot-sensitized solar cells
作者:	鄭芳怡;Peng, Shengjie;Zhang, Tianran;Li, Linlin;Shen, Chao;Cheng, Fangyi;Srinivasan, Madhavi;Yan, Qingyu;Ramakrishna, Seeram;Chen, Jun
贡献者:	地球科學學院大氣科學學系
关键词:	Cation exchange reaction;Hierarchical films;Porous nanosheets;Quantum-dot sensitized solar cells;Sulfide counterelectrode
日期:	2015-09-01
上传时间:	2026-04-21 14:07:02 (UTC+8)
出版者:	Elsevier BV;Elsevier Ltd
摘要:	摘要： Quantum-dot sensitized solar cells (QDSCs), as a promising type of new generation photovoltaic devices, require an efficient and inexpensive counterelectrode (CE) for their commercial application. In this work, novel noble-metal-free Cu-doped CoS (Cu–CoS) CEs are designed for QDSCs. The hierarchical three-dimensional (3D) Cu–CoS porous nanosheet films on fluorine doped tin oxide (FTO) glass are prepared by a simple hydrothermal reaction followed by a cation exchange reaction process. As an alternative to Pt electrode, the 3D structure of porous Cu–CoS nanosheets with high reflectivity can provide a great large number of active catalytic sites and easy accessibility toward Sn2−/S2− electrolyte solution, leading to high electrocatalytic activity. Theoretical calculations are further performed to demonstrate the superior catalytic activity for the Cu–CoS CE. As a result, the QDSC with an optimized Cu–CoS CE exhibits a high photovoltaic conversion efficiency of 6.1% under 100mWcm−2 irradiation, which is much higher than that of the references Pt and bare CoS CEs. Furthermore, this QDSC device shows long-term stability, which makes it as a very promising and low cost effective material for QDSCs. A novel noble-metal-free Cu–CoS counterelectrode, which is prepared by a facile hydrothermal reaction followed by a cation exchange reaction process, is applied in quantum-dot sensitized solar cells, which exhibit superior photovoltaic performance. [Display omitted] •3D Cu–CoS porous nanosheet films are prepared by a facile chemical method.•The noble-metal-free Cu–CoS CEs are designed for QDSCs.•The porous Cu–CoS nanosheet film possesses high optical reflectivity.•The QDSC with an optimized Cu–CoS CE exhibits a high photovoltaic performance.•Theoretical calculations are further performed to show the superior catalytic activity. 出版者： Elsevier Ltd 出版日期： 2015-09 出處： Nano energy, 2015-09, Vol.16, p.163-172 版權： 2015 Elsevier Ltd 識別號： ISSN: 2211-2855 識別號： DOI: 10.1016/j.nanoen.2015.06.019
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