文献类型：期刊文献

中文题名：High electron mobility fluorinated indacenodithiophene small molecule acceptors for organic solar cells

作者：Fei Pan Xiaojun Li Song Bai Tianhao Liu Xian Wei Yingfen Li Shanshan Chen Changduk Yang Xiwen Chen Menglan Lv Yongfang Li

第一作者：Fei Pan

机构：[1]School of Chemical Engineering,Guizhou Institute of Technology,Guiyang 550003,China;[2]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;[3]School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China;[4]School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;[5]MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems,CQU-NUS Renewable Energy Materials&Devices Joint Laboratory,School of Energy&Power Engineering,Chongqing University,Chongqing 400044,China;[6]Department of Energy Engineering,School of Energy and Chemical Engineering,Low Dimensional Carbon Materials Center,Ulsan National Institute of Science and Technology(UNIST),Ulsan 689-798,South Korea;[7]Guangzhou Polyforte Chemical Technology Co.Ltd.,Guangzhou 510520,China

第一机构：贵州理工学院化学工程学院

年份：2021

卷号：32

期号：3

起止页码：1257-1262

中文期刊名：中国化学快报：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；PubMed;

基金：supported by the Natural Science Foundation of China(Nos.51820105003,51863002 and 51973042);Excellent young scientific and technological talents of Guizhou,China(No.QKHPTRC[2019]5652)。

语种：英文

中文关键词：Organic solar cells;Indacenodithiophene;Electron mobility;Fluorination;π-πStacking;Crystallinity

摘要：Indacenodithiophene(IDT)derivatives are kinds of the most representative and widely used cores of small molecule acceptors(SMAs)in organic solar cells(OSCs).Here we systematically investigate the influence of end-group fluo rination density and position on the photovoltaic properties of the IDT-based SMAs IDIC-nF(n=0,2,4).The absorption edge of IDIC-nF red-shifts with theπ-πstacking and crystallinity improvement,and their electronic energy levels downshift with increasing n.Due to the advantages of J_(sc)and FF as well as acceptable V_(oc),the difluorinated IDIC-2 F acceptor based OSCs achieve the highest power conversion efficiency(PCE)of 13%,better than the OSC devices based on IDIC and IDIC-4 F as acceptors.And the photovoltaic performance of the PTQ10:IDIC-2 F OSCs is insensitive to the active layer thickness:PCE still keep high values of 12.00%and 11.46%for the devices with active layer thickness of 80 and 354 nm,respectively.This work verifies that fine and delicate modulation of the SMAs molecular structure could optimize photovoltaic performance of the corresponding OSCs.Meanwhile,the thickness-insensitivity property of the OSCs has potential for large-scale and printable fabrication technology.