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Influences of the Non‐Covalent Interaction Strength on Reaching High Solid‐State Order and Device Performance of a Low Bandgap Polymer with Axisymmetrical Structural Units
Author(s) -
Jheng JyunFong,
Lai YuYing,
Wu JhongSian,
Chao YiHsiang,
Wang ChienLung,
Hsu ChainShu
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201300098
Subject(s) - materials science , copolymer , band gap , polymer , intermolecular force , covalent bond , fluorine , solid state , optoelectronics , polymer solar cell , solar cell , heterojunction , chemical engineering , polymer chemistry , composite material , chemistry , organic chemistry , molecule , engineering , metallurgy
A high organic field‐effect transistor mobility (0.29 cm 2 V −1 s −1 ) and bulk‐heterojunction polymer solar cell performance (PCE of 6.82%) have been achieved in a low bandgap alternating copolymer consisting of axisymmetrical structural units, 5,6‐difluorobenzo‐2,1,3‐thiadiazole. Introducing the fluorine substituents enhanced intermolecular interaction and improved the solid‐state order, which consequently resulted in the highest device performances among the 2,1,3‐thiadiazole‐quarterthiophene based alternating copolymers.