文献类型：期刊文献

英文题名：Synthesis and photovoltaic properties of conjugated copolymers containing cyclopentadithiophene and two different electron-deficient moieties in the polymer backbone

作者：Li, Chao[1];Li, Yongxi[1];Wang, Xiaoyang[2];Zhang, Bin[3];Chen, Yu[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China;[3]Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 119260, Singapore

年份：2015

卷号：22

期号：5

外文期刊名：JOURNAL OF POLYMER RESEARCH

收录：;EI(收录号：20151900816834);WOS:【SCI-EXPANDED(收录号:WOS:000354637800001)】；

语种：英文

外文关键词：Conjugated polymers; Synthesis; Thin films; D-A(1)-D-A(2) copolymers

摘要：By using cyclopentadithiophene (CPDT) as an electron-rich unit, difluro-2,1,3-benzothiadiazole (DFBT), diketopyrrolopyrrole (DPP) and thienopyrroledione (TPD) as electron deficient units, two novel alternating conjugated copolymers with a D-A(1)-D-A(2) structure, PCPDT-DFBT-TPD and PCPDT-DFBT-DPP, were designed and synthesized. The incorporation of two electron-deficient units in the structure of terpolymer could enhance solubility, adjust band gap, optimize stack property, and change the electron distribution in the system. Both the polymers PCPDT-DFBT-TPD and PCPDT-DFBT-DPP show highly solubility in o-dichlorobenzene, chlorobenzene, and o-xylene. Optical bandgaps of these polymers can be estimated by extrapolating from the absorption edge of these films to be 1.56 eV for PCPDT-DFBT-TDP and 1.34 eV for PCPDT-DFBT-DPP. The power conversion efficiencies of 3.15 % for PCPDT-DFBT-TPD and 3.11 % for PCPDT-DFBT-DPP were achieved in a bulk heterojunction (BHJ) photovoltaic device with a configuration of ITO/PEDOT: PSS/Polymers: PC71BM/C-60-bis surfactant/Ag under the illumination of AM 1.5G at 100 mA cm(-2).