Structure and doping optimization of IDT-Based copolymers for thermoelectrics

Tongchao Liu; Dexun Xie; Jinjia Xu; Chengjun Pan

doi:10.3390/polym12071463

Structure and doping optimization of IDT-Based copolymers for thermoelectrics

Tongchao Liu, Dexun Xie, Jinjia Xu, Chengjun Pan

University of Missouri-St. Louis

Research output: Contribution to journal › Article › peer-review

Abstract

π-conjugated backbones play a fundamental role in determining the thermoelectric (TE) properties of organic semiconductors. Understanding the relationship between the structure-property- function can help us screen valuable materials. In this study, we designed and synthesized a series of conjugated copolymers (P1, P2, and P3) based on an indacenodithiophene (IDT) building block. A copolymer (P3) with an alternating donor-acceptor (D-A) structure exhibits a narrower band gap and higher carrier mobility, which may be due to the D-A structure that helps reduce the charge carrier transport obstacles. In the end, its power factor reaches 4.91 μWm -1 K -2 at room temperature after doping, which is superior to those of non-D-A IDT-based copolymers (P1 and P2). These results indicate that moderate adjustment of the polymer backbone is an effective way to improve the TE properties of copolymers.

Original language	American English
Journal	Polymers
Volume	12
DOIs	https://doi.org/10.3390/polym12071463
State	Published - Jul 2020

Keywords

Backbone engineering
Conjugated polymer
Indacenodithiophene (IDT)
Organic thermoelectric materials

Disciplines

Biochemistry, Biophysics, and Structural Biology

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Cite this

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title = "Structure and doping optimization of IDT-Based copolymers for thermoelectrics",

abstract = " π-conjugated backbones play a fundamental role in determining the thermoelectric (TE) properties of organic semiconductors. Understanding the relationship between the structure-property- function can help us screen valuable materials. In this study, we designed and synthesized a series of conjugated copolymers (P1, P2, and P3) based on an indacenodithiophene (IDT) building block. A copolymer (P3) with an alternating donor-acceptor (D-A) structure exhibits a narrower band gap and higher carrier mobility, which may be due to the D-A structure that helps reduce the charge carrier transport obstacles. In the end, its power factor reaches 4.91 μWm -1 K -2 at room temperature after doping, which is superior to those of non-D-A IDT-based copolymers (P1 and P2). These results indicate that moderate adjustment of the polymer backbone is an effective way to improve the TE properties of copolymers. ",

keywords = "Backbone engineering, Conjugated polymer, Indacenodithiophene (IDT), Organic thermoelectric materials",

author = "Tongchao Liu and Dexun Xie and Jinjia Xu and Chengjun Pan",

year = "2020",

month = jul,

doi = "10.3390/polym12071463",

language = "American English",

volume = "12",

journal = "Polymers",

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TY - JOUR

T1 - Structure and doping optimization of IDT-Based copolymers for thermoelectrics

AU - Liu, Tongchao

AU - Xie, Dexun

AU - Xu, Jinjia

AU - Pan, Chengjun

PY - 2020/7

Y1 - 2020/7

N2 - π-conjugated backbones play a fundamental role in determining the thermoelectric (TE) properties of organic semiconductors. Understanding the relationship between the structure-property- function can help us screen valuable materials. In this study, we designed and synthesized a series of conjugated copolymers (P1, P2, and P3) based on an indacenodithiophene (IDT) building block. A copolymer (P3) with an alternating donor-acceptor (D-A) structure exhibits a narrower band gap and higher carrier mobility, which may be due to the D-A structure that helps reduce the charge carrier transport obstacles. In the end, its power factor reaches 4.91 μWm -1 K -2 at room temperature after doping, which is superior to those of non-D-A IDT-based copolymers (P1 and P2). These results indicate that moderate adjustment of the polymer backbone is an effective way to improve the TE properties of copolymers.

AB - π-conjugated backbones play a fundamental role in determining the thermoelectric (TE) properties of organic semiconductors. Understanding the relationship between the structure-property- function can help us screen valuable materials. In this study, we designed and synthesized a series of conjugated copolymers (P1, P2, and P3) based on an indacenodithiophene (IDT) building block. A copolymer (P3) with an alternating donor-acceptor (D-A) structure exhibits a narrower band gap and higher carrier mobility, which may be due to the D-A structure that helps reduce the charge carrier transport obstacles. In the end, its power factor reaches 4.91 μWm -1 K -2 at room temperature after doping, which is superior to those of non-D-A IDT-based copolymers (P1 and P2). These results indicate that moderate adjustment of the polymer backbone is an effective way to improve the TE properties of copolymers.

KW - Backbone engineering

KW - Conjugated polymer

KW - Indacenodithiophene (IDT)

KW - Organic thermoelectric materials

U2 - 10.3390/polym12071463

DO - 10.3390/polym12071463

M3 - Article

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JO - Polymers

JF - Polymers

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