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Side‐Chain Effects on the Thermoelectric Properties of Fluorene‐Based Copolymers
Author(s) -
Liang Ansheng,
Zhou Xiaoyan,
Zhou Wenqiao,
Wan Tao,
Wang Luhai,
Pan Chengjun,
Wang Lei
Publication year - 2017
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.201600817
Subject(s) - alkyl , conjugated system , materials science , thermoelectric effect , polymer , seebeck coefficient , side chain , polymer chemistry , thermoelectric materials , fluorene , chain (unit) , chemical engineering , organic chemistry , thermal conductivity , chemistry , composite material , thermodynamics , physics , engineering , astronomy
Three conjugated polymers with alkyl chains of different lengths are designed and synthesized, and their structure–property relationship as organic thermoelectric materials is systematically elucidated. All three polymers show similar photophysical properties, thermal properties, and mechanical properties; however, their thermoelectric performance is influenced by the length of their side chains. The length of the alkyl chain significantly influences the electrical conductivity of the conjugated polymers, and polymers with a short alkyl chain exhibit better conductivity than those with a long alkyl chain. The length of the alkyl chain has little effect on the Seebeck coefficient. Only a slight increase in the Seebeck coefficient is observed with the increasing length of the alkyl chain. The purpose of this study is to provide comprehensive insight into fine‐tuning the thermoelectric properties of conjugated polymers as a function of side‐chain engineering, thereby providing a novel perspective into the design of high‐performance thermoelectric conjugated polymers.