文献类型：期刊文献

英文题名：Efficient dye-sensitized solar cells based on concerted companion dyes: Systematic optimization of thiophene units in the organic dye components

作者：Luo, Jiaxin;Xie, Zhengli;Zou, Jiazhi;Wu, Xinyan[1];Gong, Xueqing[1];Li, Chengjie[1];Xie, Yongshu[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Ctr Computat Chem, Inst Fine Chem, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：33

期号：9

起止页码：4313

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000815137000033)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 22131005, 21772041, 21971063 and 22075077), the Program of Shanghai Academic Research Leader (No. 20XD1401400), the Natural Science Foundation of Shanghai (No. 20ZR1414100), and the Fundamental Research Funds for the Central Universities (No. 222201717003).

语种：英文

外文关键词：Dye sensitized solar cells; Concerted companion dyes; Porphyrin dyes; Cosensitization

摘要：To develop efficient concerted companion (CC) dyes for fabricating high-performance DSSCs, three organic dyes XL1-XL3 have been designed by varying the position and number of the beta-hexylthiophene (HT) bridges, and these organic dye units are covalently linked with our previously reported porphyrin dye XW10 to construct the corresponding CC dyes XW74-XW76. Among the organic dyes, XL3 contains two beta-hexylthiophene units at both the donor and acceptor parts and thus possesses stronger light-harvesting capability in the green light region. Because of the most complementary absorption between XL3 and XW10 as well as the excellent photovoltaic behavior of the individual XL3 dye, the corresponding CC dye XW76 affords the best PCE (10.78%) among all the CC dyes. Upon coadsorption with CDCA, XW76 affords a highest PCE of 11.35%, which outperforms the previous cosensitization system of XW10+WS-5. This work provides an approach for developing efficient DSSCs based on CC dyes composed of an organic dye unit with suitable pi spacers inserted at appropriate positions. (C) 2022 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.