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Incorporation of 2,6‐Connected Azulene Units into the Backbone of Conjugated Polymers: Towards High‐Performance Organic Optoelectronic Materials
Author(s) -
Xin Hanshen,
Ge Congwu,
Jiao Xuechen,
Yang Xiaodi,
Rundel Kira,
McNeill Christopher R.,
Gao Xike
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201711802
Subject(s) - azulene , conjugated system , materials science , polymer , transistor , energy conversion efficiency , optoelectronics , copolymer , acceptor , organic semiconductor , electron mobility , electron acceptor , photochemistry , chemistry , electrical engineering , physics , composite material , condensed matter physics , voltage , engineering
Azulene is a promising candidate for constructing optoelectronic materials. An effective strategy is presented to obtain high‐performance conjugated polymers by incorporating 2,6‐connected azulene units into the polymeric backbone, and two conjugated copolymers P(TBAzDI‐TPD) and P(TBAzDI‐TFB) were designed and synthesized based on this strategy. They are the first two examples for 2,6‐connected azulene‐based conjugated polymers and exhibit unipolar n‐type transistor performance with an electron mobility of up to 0.42 cm 2 V −1 s −1 , which is among the highest values for n‐type polymeric semiconductors in bottom‐gate top‐contact organic field‐effect transistors. Preliminary all‐polymer solar cell devices with P(TBAzDI‐TPD) as the electron acceptor and PTB7‐Th as the electron donor display a power conversion efficiency of 1.82 %.