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Diketopyrrolopyrrole‐Porphyrin Based Conjugated Polymers for Ambipolar Field‐Effect Transistors
Author(s) -
Zhou Shichao,
Li Cheng,
Zhang Jianqi,
Yu Yaping,
Zhang Andong,
Wu Yonggang,
Li Weiwei
Publication year - 2017
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.201700472
Subject(s) - porphyrin , ambipolar diffusion , conjugated system , materials science , polymer solar cell , optoelectronics , polymer , transistor , band gap , heterojunction , electron mobility , field effect transistor , photochemistry , solar cell , electron , chemistry , electrical engineering , physics , quantum mechanics , voltage , composite material , engineering
Porphyrin‐based molecules have been widely used in dye‐sensitized solar cells and bulk heterojunction solar cells, but their application in field‐effect transistors (FETs) is limited. In this work, two conjugated polymers based on diketopyrrolopyrrole and porphyrin units were developed for FETs. The polymers exhibit extra‐low band gap with energy levels close to −4.0 eV and −5.0 eV due to the strong electron‐donating and withdrawing ability of porphyrin and diketopyrrolopyrrole. With additionally high crystalline properties, ambipolar charge carrier transports with a hole mobility of 0.1 cm 2 V −1 s −1 in FETs were realized in these polymers, representing the highest performance in solution‐processed FETs based on porphyrin unit.