文献类型：期刊文献

英文题名：Highly efficient and stable quasi-solid-state quantum dot-sensitized solar cells based on a superabsorbent polyelectrolyte

作者：Feng, Wenliang[1];Li, Yan[1];Du, Jun[1];Wang, Wei[1];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2016

卷号：4

期号：4

起止页码：1461

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20160501865499);WOS:【SCI-EXPANDED(收录号:WOS:000368837800038)】；

基金：We acknowledge the National Natural Science Foundation of China (No. 21421004, 91433106, and 21301059), the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-14C04), and the Fundamental Research Funds for the Central Universities in China for financial support.

语种：英文

外文关键词：Metals - Semiconductor quantum dots - Metal ions - Nanocrystals - Solid electrolytes - Carboxylation - II-VI semiconductors - Solar cells - Cadmium compounds - Selenium compounds - Liquids - Polysulfides - Titanium dioxide

摘要：Limited by the volatilization and leakage of liquid electrolytes, the long-term stability of liquid-junction quantum dot sensitized solar cells (QDSCs) remains a main challenge for the application of QDSCs. Herein, a polyelectrolyte with superior water-absorbing and water-holding capacity, sodium polyacrylate (PAAS), was attempted to gelate conventional aqueous polysulfide electrolytes to construct quasi-solid-state QDSCs. PAAS gel electrolytes have a comparable conductivity with liquid polysulfide electrolytes. Meanwhile, the PAAS gel could penetrate readily into the framework of mesoporous TiO2 film electrodes due to the strong coordination ability of carboxylate groups on PAAS polymer chains with metal ions. Benefited from the high conductivity of the PAAS gel and its perfect contact with the TiO2 surface, an impressive photovoltaic performance with a power conversion efficiency of 8.54% in one full sunlight, which is among the best performance for QDSCs, was achieved for CdSeTe QDSCs. Furthermore, the light-soaking stability of the resulting cell devices is significantly improved in comparison with that of the conventional aqueous polysulfide electrolyte based ones.