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Selenium‐Substituted Diketopyrrolopyrrole Polymer for High‐Performance p‐Type Organic Thermoelectric Materials
Author(s) -
Ding Jiamin,
Liu Zitong,
Zhao Wenrui,
Jin Wenlong,
Xiang Lanyi,
Wang Zhijie,
Zeng Yan,
Zou Ye,
Zhang Fengjiao,
Yi Yuanping,
Diao Ying,
McNeill Christopher R.,
Di Chongan,
Zhang Deqing,
Zhu Daoben
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201911058
Subject(s) - thermoelectric effect , materials science , polymer , selenium , doping , seebeck coefficient , thermoelectric materials , intermolecular force , organic semiconductor , nanotechnology , electron mobility , sulfur , chemical engineering , polymer chemistry , organic chemistry , optoelectronics , chemistry , composite material , thermodynamics , molecule , metallurgy , thermal conductivity , physics , engineering
Development of high‐performance organic thermoelectric (TE) materials is of vital importance for flexible power generation and solid‐cooling applications. Demonstrated here is the significant enhancement in TE performance of selenium‐substituted diketopyrrolopyrrole (DPP) derivatives. Along with strong intermolecular interactions and high Hall mobilities of 1.0–2.3 cm 2 V −1 s −1 in doping‐states for polymers, PDPPSe‐12 exhibits a maximum power factor and ZT of up to 364 μW m −1 K −2 and 0.25, respectively. The performance is more than twice that of the sulfur‐based DPP derivative and represents the highest value for p‐type organic thermoelectric materials based on high‐mobility polymers. These results reveal that selenium substitution can serve as a powerful strategy towards rationally designed thermoelectric polymers with state‐of‐the‐art performances.