Enhanced Thermoelectric Performance of PEDOT:PSS Films by Sequential Post-Treatment with Formamide

Kyaw, Aung Ko Ko1,2; Yemata, Temesgen A.1,3; Wang, Xizu1; Lim, Siew Lay1; Chin, Wee Shong3; Hippalgaonkar, Kedar1; Xu, Jianwei1,3

2018-02

10.1002/mame.201700429

MACROMOLECULAR MATERIALS AND ENGINEERING   影响因子和分区

1438-7492

1439-2054

This paper reports a series of sequential post-treatments using a polar solvent formamide to enhance the thermoelectric performance of poly(3,4-ethylenedioxythiophene) doped with poly(styrene sulfonate) anions (PEDOT:PSS). The electrical conductivity of PEDOT:PSS films significantly increases from 0.33 S cm(-1) for the pristine film to approximate to 2929 S cm(-1) for the treated film and meanwhile the Seebeck coefficient maintains as high as 17.4 mu V K-1, resulting in a power factor of 88.7 mu W m(-1) K-2. Formamide is a polar solvent with a high boiling point of 210 degrees C and high dielectric constant of 109, and PSS has a good solubility in it. Post-treatment with formamide causes not only the phase segregation of PEDOT and PSS but also the removal of insulating PSS, therefore leading to the reorientation of PEDOT chains and enhancement in mobility without altering the doping level considerably. The cross-plane thermal conductivity also reduces from 0.54 to 0.19 W m(-1) K-1 after the post-treatment, leading to a figure of merit (ZT) value of 0.04 at room temperature.

electrical conductivity formamide PEDOT post-treatment thermoelectric

SCI ; EI

英语

通讯

A^starSTAR, Industry Alignment Fund, Pharos "Hybrid thermoelectric materials for ambient applications" Programme[1527200019]

Materials Science ; Polymer Science

Materials Science, Multidisciplinary ; Polymer Science

WOS:000425103200012

WILEY-V C H VERLAG GMBH

20174804452796

Amides ; Electric conductivity ; Semiconductor doping ; Styrene ; Thermal conductivity ; Thermoelectricity

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Conducting Materials:708.2 ; Semiconducting Materials:712.1 ; Organic Compounds:804.1

MATERIALS SCIENCE

Web of Science

1.ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way, Singapore 138634, Singapore
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore

Kyaw, Aung Ko Ko,Yemata, Temesgen A.,Wang, Xizu,et al. Enhanced Thermoelectric Performance of PEDOT:PSS Films by Sequential Post-Treatment with Formamide[J]. MACROMOLECULAR MATERIALS AND ENGINEERING,2018,303(2).

Kyaw, Aung Ko Ko.,Yemata, Temesgen A..,Wang, Xizu.,Lim, Siew Lay.,Chin, Wee Shong.,...&Xu, Jianwei.(2018).Enhanced Thermoelectric Performance of PEDOT:PSS Films by Sequential Post-Treatment with Formamide.MACROMOLECULAR MATERIALS AND ENGINEERING,303(2).

Kyaw, Aung Ko Ko,et al."Enhanced Thermoelectric Performance of PEDOT:PSS Films by Sequential Post-Treatment with Formamide".MACROMOLECULAR MATERIALS AND ENGINEERING 303.2(2018).