Premium
Anisotropic Charge‐Carrier Transport in High‐Mobility Donor–Acceptor Conjugated Polymer Semiconductor Films
Author(s) -
Zhao Zhiyuan,
Liu Hongtao,
Zhao Yan,
Cheng Cheng,
Zhao Jing,
Tang Qingxin,
Zhang Guangyu,
Liu Yunqi
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600082
Subject(s) - materials science , charge carrier , electron mobility , acceptor , polymer , anisotropy , stacking , copolymer , polystyrene , semiconductor , optoelectronics , transistor , field effect transistor , chemical physics , condensed matter physics , optics , chemistry , organic chemistry , composite material , electrical engineering , voltage , physics , engineering
Many high‐performance solution‐processable polymer thin‐film transistors (PTFTs) have been reported. This contribution presents a comparative study of oriented films that have been deposited by means of solution shearing (SS) with charge‐carrier transport anisotropy for PTFTs based on a diketopyrrolopyrrole–thiazolothiazole donor–acceptor copolymer (PDPPTzBT). The maximum field‐effect mobility of the SS film of PDPPTzBT was 10.00 cm 2 V −1 s. We also blended a solution of PDPPTzBT with a solution of polystyrene (PS). Solvent vapor annealing (SVA) lateral phase separation was adopted to block carrier transport in the direction of π–π stacking, and further evidence of charge transport anisotropy was provided. Highly oriented polymer films will further influence the carrier transport anisotropy and promote carrier transport along the backbone, and the performance of the field‐effect transistor is thus improved.