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Hole Mobility and Electron Injection Properties of D‐A Conjugated Copolymers with Fluorinated Phenylene Acceptor Units
Author(s) -
Wang Ming,
Ford Michael J.,
Lill Alexander T.,
Phan Hung,
Nguyen ThucQuyen,
Bazan Guillermo C.
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201603830
Subject(s) - materials science , conjugated system , copolymer , electron mobility , phenylene , acceptor , polymer , transistor , electron acceptor , electron transport chain , electron , band gap , homo/lumo , optoelectronics , chemical physics , photochemistry , organic chemistry , voltage , condensed matter physics , molecule , electrical engineering , chemistry , physics , engineering , quantum mechanics , composite material , biochemistry
A novel wide‐gap conjugated polymer PhF2,5 ( E g = 1.9 eV) is designed to contain alternating cyclopentadithiophene and difluorophenylene unit with the goal of favoring unipolar organic field effect transistor characteristics. The higher lowest unoccupied molecular orbital energy of PhF2,5 increases the barrier to electron injection, leading to unipolar transport and higher on/off ratios, without sacrificing desirable high hole mobilities.