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Enhancement of Thermoelectric Performance of DPP based Polymer by Introducing 3,4-Ethylenedioxythiophene Electron-rich Building Block

Abstract

Donor−acceptor (D−A) type conjugated polymers are promising high performance thermoelectric (TE) materials due to their high carrier mobility, versatile structure and easily tuneable doping level. In this work, we demonstrate significant enhancement in TE performance of diketopyrrolopyrrole (DPP) based D-A conjugated polymers through incorporation of 3,4-ethylenedioxythiophene (EDOT) building block. With one thiophene building block of PDPP-5T was substituted by EDOT, the HOMO level of PDPP-4T-EDOT could be increased and the coplanarity of the conjugated backbone was slightly enhanced, which could facilitate the efficient p-doping of the conjugated polymer. Compared with PDPP-5T, PDPP-4T-EDOT exhibited much higher optimal TE power factor of 298.2 μW m-1K-2 at lower doping level, which is among the highest value for p-type organic thermoelectric materials based on D-A conjugated polymers. The results provie an attractive guidance to design and develop high performance thermoelectric conjugated polymers.

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Supplementary files

Article information


Submitted
01 Mar 2020
Accepted
15 May 2020
First published
15 May 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Enhancement of Thermoelectric Performance of DPP based Polymer by Introducing 3,4-Ethylenedioxythiophene Electron-rich Building Block

P. Li, Z. Liu, Y. Hu, J. Wen, J. He and X. Gao, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC01047B

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