文献类型：期刊文献

英文题名：Porphyrins containing a tetraphenylethylene-substituted phenothiazine donor for fabricating efficient dye sensitized solar cells with high photovoltages

作者：Zou, Jiazhi[1];Tang, Yunyu[2];Baryshnikov, Glib[3];Yang, Zhen[1];Mao, Rui[1];Feng, Weifang[1];Guan, Jian[1];Li, Chengjie[1];Xie, Yongshu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Lab Qual Safety & Proc Aquat Prod, Shanghai 200090, Peoples R China;[3]Linkoping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrkoping, Sweden

年份：2022

卷号：10

期号：3

起止页码：1320

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20220511555864);WOS:【SCI-EXPANDED(收录号:WOS:000731716100001)】；

基金：This work was financially supported by the NSFC (21772041, 22131005, 21971063, and 22075077), Program of Shanghai Academic Research Leader (20XD1401400), and Natural Science Foundation of Shanghai (20ZR1414100). G. B. acknowledges the support from the Swedish Research Council (starting grant no. 2020-04600). The quantum-chemical calculations were partially performed with computational resources provided by Swedish National Infrastructure for Computing (SNIC 2020-3-29) at the High-Performance Computing Center North (HPC2N) partially funded by the Swedish Research Council through the grant agreement no. 2018-05973. The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help in the characterization.

语种：英文

外文关键词：Dye-sensitized solar cells - Efficiency - Insecticides

摘要：With the aim to enhance the photovoltages and efficiencies of dye sensitized solar cells (DSSCs) based on porphyrin dyes, a dialkoxy-substituted highly twisted tetraphenylethylene (TPE) moiety has been introduced into the donor unit of a porphyrin dye to suppress dye aggregation and charge recombination. Thus, based on our previously reported porphyrin dye XW43, a dialkoxy-TPE moiety has been introduced into the phenothiazine donor to afford XW71. Compared with the diethyleneglycol substituent in XW43, the bulkier dialkoxy-TPE unit in XW71 is more beneficial for suppressing charge recombination. The alkoxy chains on the TPE moieties in XW71 are extended outward from the molecule and folded toward the porphyrin macrocycle, respectively, favorable for suppressing dye aggregation and charge recombination. As a result, the V-OC was dramatically improved from 0.750 V (XW43) to 0.765 V (XW71). On this basis, the substituents surrounding the porphyrin macrocycle have been optimized to further improve the V-OC and the efficiencies. Thus, XW72 and XW73 have been synthesized by replacing the dodecyloxy moieties on the meso-phenyl substituents of XW71 with two diethyleneglycol (DEG) chains and double straps, respectively. As a result, XW72 and XW73 exhibit a gradually improved V-OC of 0.772 V and 0.777 V, respectively, and a high power conversion efficiency (PCE) of 11.0% has been achieved for XW73. Upon coadsorption and cosensitization, the efficiency can be further enhanced to an outstanding value of 12.3% for the XW73 + CDCA + XC3 system.