Effects of carbon nanomaterials hybridization of Poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) on thermoelectric performance

Yihan Wang; Siqi Wu; Rui Zhang; Kai Du; Qiang Yin; Bo Jiang; Qinjian Yin; Kun Zhang

doi:10.1088/1361-6528/ac17c3

Effects of carbon nanomaterials hybridization of Poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) on thermoelectric performance

Nanotechnology. 2021 Aug 13;32(44). doi: 10.1088/1361-6528/ac17c3.

Authors

Yihan Wang¹, Siqi Wu¹, Rui Zhang¹, Kai Du², Qiang Yin², Bo Jiang¹, Qinjian Yin¹, Kun Zhang³

Affiliations

¹ College of Chemistry, Sichuan University, Chengdu, 610064, People's Republic of China.
² Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, People's Republic of China.
³ Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, People's Republic of China.

PMID: 34311457
DOI: 10.1088/1361-6528/ac17c3

Abstract

The influence of multiple dimensional carbon nanomaterials, such as graphene quantum dots (GQD), multi-walled carbon nanotubes (MWCNT), and graphene sheets (GNS) of the thermoelectric properties in poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS)-based hybrids have been investigated. PEDOT: PSS matrix was successfully used to prepare PEDOT: PSS/GQDs (PGQD), PEDOT: PSS/MWCNT (PCNT) and PEDOT: PSS/GNS (PGNS) composite films. According to structural characteristics, strongπ-πinteractions existed between carbon materials and PEDOT: PSS, and PEDOT: PSS layers with organized and arranged morphology were easier templated by GNS than GQD or MWCNT. It was found that besides energy filtering effect, hole-phonon interaction occurred with further addition of GNS and GQDs in PGNS and PGQD composite films. The optimal power factor (PF) of approximately 580 and 103μW m^-1K^-2at 363 K were acquired in PGNS composite films at 5 wt% GNS and PGQD films with 1 wt% GQD filling, respectively. Unlike PGNS and PGQD films, electrical conductivity of PCNT reduced upon the addition of MWCNT, while the Seebeck coefficient decreased firstly, and then increased and reached to the highest value at 10 wt% MWCNT. The optimal PF of 381.8μW m^-1K^-2at 363 K was obtained with weight fraction of 0.1 wt% in PCNT films.

Keywords: PEDOT: PSS; graphene; graphene quantum dots; multi-walled carbon nanotubes; thermoelectric properties.