PEDOT:PSS/graphene quantum dots films with enhanced thermoelectric properties via strong interfacial interaction and phase separation

Fei-Peng Du; Nan-Nan Cao; Yun-Fei Zhang; Ping Fu; Yan-Guang Wu; Zhi-Dong Lin; Run Shi; Abbas Amini; Chun Cheng

doi:10.1038/s41598-018-24632-4

PEDOT:PSS/graphene quantum dots films with enhanced thermoelectric properties via strong interfacial interaction and phase separation

Fei-Peng Du, Nan-Nan Cao, Yun-Fei Zhang, Ping Fu, Yan-Guang Wu, Zhi-Dong Lin, Run Shi, Abbas Amini, Chun Cheng

Western Sydney University

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

197 Citations (Scopus)

Abstract

The typical conductive polymer of PEDOT:PSS has recently attracted intensive attention in thermoelectric conversion because of its low cost and low thermal conductivity as well as high electrical conductivity. However, compared to inorganic counterparts, the relatively poor thermoelectric performance of PEDOT:PSS has greatly limited its development and high-tech applications. Here, we report a dramatic enhancement in the thermoelectric performance of PEDOT:PSS by constructing unique composite films with graphene quantum dots (GQDs). At room temperature, the electrical conductivity and Seebeck coefficient of PEDOT:PSS/GQDs reached to 7172 S/m and 14.6 Î¼V/K, respectively, which are 30.99% and 113.2% higher than those of pristine PEDOT:PSS. As a result, the power factor of the optimized PEDOT:PSS/GQDs composite is 550% higher than that of pristine PEDOT:PSS. These significant improvements are attributed to the ordered alignment of PEDOT chains on the surface of GQDs, originated from the strong interfacial interaction between PEDOT:PSS and GQDs and the separation of PEDOT and PSS phases. This study evidently provides a promising route for PEDOT:PSS applied in high-efficiency thermoelectric conversion.

Original language	English
Article number	6441
Number of pages	12
Journal	Scientific Reports
Volume	8
DOIs	https://doi.org/10.1038/s41598-018-24632-4
Publication status	Published - 2018

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Keywords

graphene
polymers
quantum dots
thermoelectricity

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10.1038/s41598-018-24632-4

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title = "PEDOT:PSS/graphene quantum dots films with enhanced thermoelectric properties via strong interfacial interaction and phase separation",

abstract = "The typical conductive polymer of PEDOT:PSS has recently attracted intensive attention in thermoelectric conversion because of its low cost and low thermal conductivity as well as high electrical conductivity. However, compared to inorganic counterparts, the relatively poor thermoelectric performance of PEDOT:PSS has greatly limited its development and high-tech applications. Here, we report a dramatic enhancement in the thermoelectric performance of PEDOT:PSS by constructing unique composite films with graphene quantum dots (GQDs). At room temperature, the electrical conductivity and Seebeck coefficient of PEDOT:PSS/GQDs reached to 7172 S/m and 14.6 {\^I}¼V/K, respectively, which are 30.99% and 113.2% higher than those of pristine PEDOT:PSS. As a result, the power factor of the optimized PEDOT:PSS/GQDs composite is 550% higher than that of pristine PEDOT:PSS. These significant improvements are attributed to the ordered alignment of PEDOT chains on the surface of GQDs, originated from the strong interfacial interaction between PEDOT:PSS and GQDs and the separation of PEDOT and PSS phases. This study evidently provides a promising route for PEDOT:PSS applied in high-efficiency thermoelectric conversion.",

keywords = "graphene, polymers, quantum dots, thermoelectricity",

author = "Fei-Peng Du and Nan-Nan Cao and Yun-Fei Zhang and Ping Fu and Yan-Guang Wu and Zhi-Dong Lin and Run Shi and Abbas Amini and Chun Cheng",

year = "2018",

doi = "10.1038/s41598-018-24632-4",

language = "English",

volume = "8",

journal = "Scientific Reports",

issn = "2045-2322",

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TY - JOUR

T1 - PEDOT:PSS/graphene quantum dots films with enhanced thermoelectric properties via strong interfacial interaction and phase separation

AU - Du, Fei-Peng

AU - Cao, Nan-Nan

AU - Zhang, Yun-Fei

AU - Fu, Ping

AU - Wu, Yan-Guang

AU - Lin, Zhi-Dong

AU - Shi, Run

AU - Amini, Abbas

AU - Cheng, Chun

PY - 2018

Y1 - 2018

N2 - The typical conductive polymer of PEDOT:PSS has recently attracted intensive attention in thermoelectric conversion because of its low cost and low thermal conductivity as well as high electrical conductivity. However, compared to inorganic counterparts, the relatively poor thermoelectric performance of PEDOT:PSS has greatly limited its development and high-tech applications. Here, we report a dramatic enhancement in the thermoelectric performance of PEDOT:PSS by constructing unique composite films with graphene quantum dots (GQDs). At room temperature, the electrical conductivity and Seebeck coefficient of PEDOT:PSS/GQDs reached to 7172 S/m and 14.6 Î¼V/K, respectively, which are 30.99% and 113.2% higher than those of pristine PEDOT:PSS. As a result, the power factor of the optimized PEDOT:PSS/GQDs composite is 550% higher than that of pristine PEDOT:PSS. These significant improvements are attributed to the ordered alignment of PEDOT chains on the surface of GQDs, originated from the strong interfacial interaction between PEDOT:PSS and GQDs and the separation of PEDOT and PSS phases. This study evidently provides a promising route for PEDOT:PSS applied in high-efficiency thermoelectric conversion.

AB - The typical conductive polymer of PEDOT:PSS has recently attracted intensive attention in thermoelectric conversion because of its low cost and low thermal conductivity as well as high electrical conductivity. However, compared to inorganic counterparts, the relatively poor thermoelectric performance of PEDOT:PSS has greatly limited its development and high-tech applications. Here, we report a dramatic enhancement in the thermoelectric performance of PEDOT:PSS by constructing unique composite films with graphene quantum dots (GQDs). At room temperature, the electrical conductivity and Seebeck coefficient of PEDOT:PSS/GQDs reached to 7172 S/m and 14.6 Î¼V/K, respectively, which are 30.99% and 113.2% higher than those of pristine PEDOT:PSS. As a result, the power factor of the optimized PEDOT:PSS/GQDs composite is 550% higher than that of pristine PEDOT:PSS. These significant improvements are attributed to the ordered alignment of PEDOT chains on the surface of GQDs, originated from the strong interfacial interaction between PEDOT:PSS and GQDs and the separation of PEDOT and PSS phases. This study evidently provides a promising route for PEDOT:PSS applied in high-efficiency thermoelectric conversion.

KW - graphene

KW - polymers

KW - quantum dots

KW - thermoelectricity

UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:46511

U2 - 10.1038/s41598-018-24632-4

DO - 10.1038/s41598-018-24632-4

M3 - Article

SN - 2045-2322

VL - 8

JO - Scientific Reports

JF - Scientific Reports

M1 - 6441

ER -

PEDOT:PSS/graphene quantum dots films with enhanced thermoelectric properties via strong interfacial interaction and phase separation

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