Centrosymmetric Thiophenemethyleneoxindole‐Based Donor–Acceptor Copolymers for Organic Field‐Effect Transistors. Issue 11 (3rd May 2018)

• Record Type: Journal Article
• Authors: Deng, Zhifeng; Li, Leiquan; Ai, Taotao; Hao, Xiaoli; Bao, Weiwei
• Is Part Of: Macromolecular rapid communications. Volume 39:Issue 11(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-03
• Subjects: conjugated polymers -- ITTI -- organic field‐effect transistors (OFETs) -- p‐type; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201800073
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: 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. Abstract : Two novel π‐conjugated donor–acceptor polymers based on ITTI are designed and synthesized. These polymers exhibit broad UV–vis absorption, a small bandgap, a high highest occupied molecular orbital energy level, and p‐type behavior with hole mobility up to 0.65 cm 2 V −1 s −1 .