文献类型：期刊文献

英文题名：Efficient Solar Cells Based on Porphyrin and Concerted Companion Dyes Featuring Benzo 12-Crown-4 for Suppressing Charge Recombination and Enhancing Dye Loading

作者：Luo, Jiaxin[1];Lu, Qingjun[1];Li, Qizhao[1];Li, Zhemin[1];Wang, Yuqing[1];Wu, Xinyan[1];Li, Chengjie[1];Xie, Yongshu[1]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：35

起止页码：41569

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20233714702738);WOS:【SCI-EXPANDED(收录号:WOS:001063248500001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22131005, 22201074, 22075077, and 21971063), the Fundamental Research Funds for the Central Universities, Program of Shanghai Academic Research Leader (20XD1401400), Shanghai Rising-Star Program (23QA1402100), and Natural Science Foundation of Shanghai (23ZR1415600, 22ZR1416100). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for compound characterization.

语种：英文

外文关键词：porphyrin; dye-sensitized solar cells; concertedcompanion dyes; cosensitization; coadsorption

摘要：In recent years, various porphyrin dyes have been designed to develop efficient dye-sensitized solar cells (DSSCs). Based on our previously reported porphyrin dye XW43, which contains a phenothiazine donor with two diethylene glycol (DEG)-derived substituents, we herein report a porphyrin dye XW89 by introducing a benzo 12-crown-4 (BCE) unit onto the N atom of the phenothiazine donor. On this basis, XW90 and XW91 have been synthesized by replacing a DEG chain in XW89 with two DEG chains and a 12-crown-4 unit, respectively. For iodine electrolyte-based DSSCs, dyes XW89-XW91 exhibit V OC values of 765-779 mV, higher than that of XW43 (755 mV), which may be related to the strong capability of the BCE group in binding Li+ and thus suppressing the downward shift of the TiO2 conduction band and interfacial charge recombination. Moreover, the smaller size of 12-crown-4 than the DEG unit enables higher adsorption amounts of the dyes than XW43, contributing to an enhanced J SC value. Due to the presence of two BCE units, dye XW91 exhibits the highest dye loading amount and J (SC) of 1.86 x 10(-7) mol cm(-2) and 19.79 mA cm(-2), respectively, affording a high PCE of 11.1%. To further enhance the light-harvesting ability, a concerted companion (CC) dye XW92 has been constructed by linking the two subdye units corresponding to the porphyrin dye XW91 and an organic dye. As a result, XW92 affords an enhanced J (SC) and efficiency. Further coadsorption of XW92 with chenodeoxycholic acid achieved the highest efficiency of 12.1%. This work provides an effective approach for fabricating efficient DSSCs sensitized by porphyrin and CC dyes based on the introduction of crown ether units with smaller sizes and stronger Li+ affinities.