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Isothianaphthene‐Based Conjugated Polymers for Organic Photovoltaic Cells
Author(s) -
Long Guankui,
Wan Xiangjian,
Zhou Jiaoyan,
Liu Yongsheng,
Li Zhi,
He Guangrui,
Zhang Mingtao,
Hou Yanhui,
Chen Yongsheng
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200142
Subject(s) - polymer , conjugated system , organic solar cell , copolymer , photovoltaic system , materials science , polymer chemistry , energy conversion efficiency , chemical engineering , photochemistry , chemistry , optoelectronics , composite material , engineering , electrical engineering
Two novel copolymers PBDT‐DEAITN and PBDT‐DOAITN containing the same backbone of isothianaphthene (ITN) quinoidal and benzodithiophene (BDT) donor units are synthesized and their organic photovoltaic (OPV) devices are fabricated. Although these two polymers have rather low optical bandgaps, 1.52 and 1.58 eV for PBDT‐DEAITN and PBDT‐DOAITN, respectively, their OPV cells exhibit rather limited power conversion efficiencies of 1.25% and 1.20% under an AM1.5G simulated solar light. The reasons for the low OPV performance are investigated by structure modeling calculation. Based on this and the screening results for the representative quinoidal polymers in the literatures, a strategy of designing high‐ performance planar polymers based on ITN unit is proposed.