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Centrosymmetric Thiophenemethyleneoxindole‐Based Donor–Acceptor Copolymers for Organic Field‐Effect Transistors
Author(s) -
Deng Zhifeng,
Li Leiquan,
Ai Taotao,
Hao Xiaoli,
Bao Weiwei
Publication year - 2018
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800073
Subject(s) - bathochromic shift , materials science , organic field effect transistor , thiophene , polymer , stille reaction , acceptor , conjugated system , photochemistry , thermal stability , homo/lumo , polymer chemistry , transistor , field effect transistor , chemistry , organic chemistry , molecule , optics , physics , quantum mechanics , voltage , composite material , fluorescence , condensed matter physics
Two novel, donor–acceptor‐type π‐conjugated polymers (P1 and P2) with 3′‐(thieno[3,2‐b]thiophene‐2,5‐diylbis(methan‐1‐yl‐1‐ylidene))bis‐(indolin‐2‐one) (ITTI) as the acceptor and thiophene/bithiophene as the donor are designed and synthesized by palladium‐catalyzed Stille coupling. The optical and electrochemical properties of these polymers are characterized and further implemented into organic field‐effect transistors (OFET). Both polymers exhibit excellent thermal stability, broad UV–vis absorption, and high highest occupied molecular orbital energy levels. Thermal annealing induces a well‐ordered structure, a highly planar π‐system (oxygen–sulfur interaction), and a bathochromic shift in the polymers; furthermore, significant enhancement of the long wavelength intensity is also observed. Both polymers exhibit p‐type charge transport behavior, with hole mobilities up to 0.51 cm 2 V −1 s −1 for P1 and 0.65 cm 2 V −1 s −1 for P2. This work demonstrates that ITTI can be a promising building block for the construction of donor–acceptor polymers with high‐performance OFETs.