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Polar Side Chain Effects on the Thermoelectric Properties of Benzo[1,2‐b:4,5‐b′]Dithiophene‐Based Conjugated Polymers
Author(s) -
Pan Chengjun,
Wang Luhai,
Liu Tongchao,
Zhou Xiaoyan,
Wan Tao,
Wang Shichao,
Chen Zhongming,
Gao Chunmei,
Wang Lei
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201900082
Subject(s) - side chain , polymer , conjugated system , materials science , thermoelectric effect , miscibility , alkyl , dopant , polymer chemistry , doping , chemical engineering , organic chemistry , chemistry , composite material , thermodynamics , optoelectronics , physics , engineering
The molecular structure of polymers has a great influence on their thermoelectric properties; however, the relationship between the molecular structure of a polymer and its thermoelectric properties remains unclear. In this work, two benzo[1,2‐ b :4,5‐ b ′]dithiophene (BDT)‐based conjugated polymers are designed and synthesized, which contain alkyl side chains or polar side chains. The effects of the polymer side chain on the physicochemical properties are systematically investigated, especially the thermoelectric performance of the polymers after doping with 2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone and 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane. It is found that the BDT‐based conjugated polymer with polar side chains exhibits good miscibility with the dopants, leading to higher thermoelectric properties than those of the polymer with alkyl side chains. This work can serve as a reference for the future design of high‐performance organic thermoelectric polymers.