Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 62, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212979
Keywords
Acceptor-Acceptor Type; Amorphous; Conjugated Polymers; Organic Field-Effect Transistors; Rigid Polymer Backbones
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We report the first near-amorphous n-type conjugated polymer with decent electron mobility, featuring a remarkably rigid, straight, and planar polymer backbone. The polymer is the alternating copolymer of double B <- N bridged bipyridine (BNBP) unit and benzobisthiazole (BBTz) unit. It shows a decent electron mobility of 0.34 cm(2) V-1 s(-1) in organic field-effect transistors. The excellent electron transporting property of the polymer is possibly due to the ultrahigh backbone stiffness, small pi-pi stacking distance, and high molecular weight.
High charge carrier mobility polymer semiconductors are always semi-crystalline. Amorphous conjugated polymers represent another kind of polymer semiconductors with different charge transporting mechanism. Here we report the first near-amorphous n-type conjugated polymer with decent electron mobility, which features a remarkably rigid, straight and planar polymer backbone. The molecular design strategy is to copolymerize two fused-ring building blocks which are both electron-accepting, centrosymmetrical and planar. The polymer is the alternating copolymer of double B <- N bridged bipyridine (BNBP) unit and benzobisthiazole (BBTz) unit. It shows a decent electron mobility of 0.34 cm(2) V-1 s(-1) in organic field-effect transistors. The excellent electron transporting property of the polymer is possibly due to the ultrahigh backbone stiffness, small pi-pi stacking distance, and high molecular weight.
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