文献类型：期刊文献

中文题名：D-A-π-A organic dyes with fluorenyl-substituted bulky donor for efficient dye-sensitized solar cells

作者：Weiwei Zhang[1];Huiyun Jiang[1];Miaojie Yu[1];Jie Wang[2];Dong Shi[2];Wei-Hong Zhu[1];Yongzhen Wu[1]

机构：[1]Key Laboratory for Advanced Materials and Institute of Fine Chemicals,Joint International Research Laboratory of Precision Chemistry and Molecular Engineering,Feringa Nobel Prize Scientist Joint Research Center,Frontiers Science Center for Materiobiology and Dynamic Chemistry,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai,200237,China;[2]School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu,610054,China

年份：2023

卷号：4

期号：4

起止页码：393

中文期刊名：Green Chemical Engineering

外文期刊名：绿色化学工程（英文）

收录：Scopus;CSCD:【CSCD2023_2024】；

基金：supported by the National Natural Science Foundation of China(NSFC)(22179037,21788102,and 21905091);Shanghai Municipal Science and Technology Major Project(2018SHZDZX03 and 21JC1401700);Shanghai Municipal Science and Technology(20120710200);the Fundamental Research Funds for the Central Universities and China Postdoctoral Science Foundation(No.2019M651418)

语种：英文

中文关键词：Dye-sensitized solar cells;Fluorenyl-substituted bulky donor;Phenanthrene-fused-quinoxaline;Electron injection;Power conversion efficiency

摘要：Improving light-harvesting efficiency and suppressing interfacial charge recombination are of paramount importance to the development of Cu(Ⅱ/Ⅰ)redox shuttle-based dye-sensitized solar cells(DSSCs).Here,we present a rational molecular engineering on D-A-π-A organic sensitizers featuring with fluorenyl-substituted bulky donor(HY57,HY60,and HY61)for Cu(Ⅱ/Ⅰ)mediated DSSCs.By gradually enhancing conjugation and rigidity of theπ-spacer and auxiliary acceptor moieties,the light-harvesting and electron-injection efficiencies can be simultaneously improved.The large size of fluorenyl-substituted arylamine donor together with abundant alkyl chains decorated on the molecular structures assist dense assembly of dye monolayer at surface of nanocrystalline TiO2,which largely suppress interfacial charge recombination losses.When applied in Cu(Ⅱ/Ⅰ)mediated DSSCs,the combination of an auxiliary acceptor of phenanthrene-fused-quinoxaline(PFQ)and aπ-spacer of cyclopentadithiophene(CPDT)in dye HY61 results in a simultaneous enhancement in short-circuit current(JSC)and open-circuit voltage(VOC),thus improving the power conversion efficiency(PCE)from 7.3%for reference dye HY59 to 10.3%for HY61.This study demonstrates that rigid and fused building block is promising towards constructing highly efficient organic sensitizers.