One-step synthesized CuS and MWCNTs composite as a highly efficient counter electrode for quantum dot sensitized solar cells

被引：28
作者：
Zhang, Yinan [1 ]
Wang, Di [1 ]
Wang, Qiming [1 ]
Zheng, Wei [1 ,2 ]
机构：
[1] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Heilongjiang, Peoples R China
[2] Inst Natl Rech Sci, Ctr Energie Mat & Telecommun, Varennes, PQ J3X 1S2, Canada
来源：
MATERIALS & DESIGN | 2018年 / 160卷
关键词：
CuS/MWCNT CEs; QDSCs; PCE; Electrocatalytic activity; Photovoltaic stability; CONVERSION EFFICIENCY; SILVER NANOPARTICLES; PERFORMANCE; SULFIDE; FABRICATION; NITROGEN; PLATINUM; ARRAYS; FILM;
D O I：
10.1016/j.matdes.2018.10.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CuS/MWCNTs counter electrode (CE) in high efficiency and stability is designed that CuS nanoparticles are grown on multi-wall carbon nanotubes (MWCNTs) in solutions to form CuS and MWCNTs composite in treelike structure that dispersed MWCNTs as branches support CuS nano-particles. The quantum dot sensitized solar cells (QDSCs) are assembled with CuS/MWCNT CE prepared with above composite, CdS and ZnS sensitized TiO2/RGO (reduced graphene oxide) photoanode and polysulfide electrolyte. The electrocatalytic activity of CEs can be analyzed through Nyquist curves and Tafel curves and typical photovoltaic parameters of QDSCs based on different CEs are obtained from J-V curves. CuS nanoparticles aggregate more severely with increase of CuS mass percentage according to TEM images and 100% CuS/MWCNTs CE within all samples exhibits the highest electrocatalytic activity and the power conversion efficiency (PCE) of QDSCs. Besides that, CuS/MWCNT CE exhibits the best photovoltaic stability. PCE of QDSCs with 100% CuS/MWCNTs CE decreases only 3%(from 5.254% to 5.086%) after 24 h illumination. (C) 2018 Elsevier Ltd.
引用
收藏
页码：870 / 875
页数：6
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