文献类型：期刊文献

英文题名：Sodium carboxymethyl starch-based highly conductive gel electrolyte for quasi-solid-state quantum dot-sensitized solar cells

作者：Wang, Xiaoyan[1];Feng, Wenliang[1];Wang, Wenran[1];Wang, Wei[1];Zhao, Lianjing[1];Li, Yan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Appl Chem, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2018

卷号：44

期号：2

起止页码：1161

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20174104258187);WOS:【SCI-EXPANDED(收录号:WOS:000422905700026)】；

基金：We acknowledge the National Natural Science Foundation of China (No. 21771063) and the Fundamental Research Funds for the Central Universities in China for financial support.

语种：英文

外文关键词：Sodium carboxymethyl starch; Quantum dot sensitized solar cells; Gel electrolyte; Long-term stability

摘要：Liquid-junction quantum dot sensitized solar cells (QDSCs) have been facing a long stability issue due to the volatilization and leakage of liquid electrolytes. Solidification of liquid electrolytes was expected to solve the main challenge for the application of QDSCs. Herein, a novel gel electrolyte was developed by solidifying conventional polysulfide aqueous solution with CMS-Na (Sodium Carboxymethyl Starch) as gelator. Due to its superior water absorbing and holding capacity as well as dimensional porous networks, the obtained CMS-Na gel electrolyte exhibits high conductivity and beneficial ion transport. Meanwhile, CMS-Na gel electrolyte could form a passivation layer coated on the surface of QDs/TiO2 via its strong coordination of carboxylate groups on CMS-Na polymer chains with metal ions, sequentially suppressing the charge recombination between photoanode and electrolyte. As expected, the constructed quasi-solid-state QDSCs exhibited a photoelectric conversion efficiency of 6.32%, which is comparable to that of liquid-junction QDSCs. Notably, light-soaking stability of the resultant QDSCs is significantly improved.