Effective ionic Seebeck component suppression in mixed ion-electron conductor via chemical treatment

Kyaw, Aung Ko Ko1,2,3; Wong, Grayson Dao Hwee1; Yemata, Temesgen A.1,4; Xu, Jianwei1,4

2019-06

10.1016/j.orgel.2019.02.014

ORGANIC ELECTRONICS   影响因子和分区

1566-1199

1878-5530

By employing time-dependent open-circuit voltage measurement, we demonstrate that a redundant ionic Seebeck component in the mixed ion-electron conducting polymer PEDOT:PSS can be suppressed by simple chemical treatments. The suppression of ionic Seebeck can be attributed to both increase in electronic conductivity and reduction in ionic conductivity, which results in a significant increase in the ratio of electronic-to-ionic conductivity. The thermogravimetric analysis and thickness swelling test confirm that PEDOT:PSS film becomes less or non-hygroscopic after treatment. Low hygroscopicity in the PEDOT:PSS film effectively cuts off the moisture-assisted ion conducting channel, consequently the ionic conductivity becomes extremely low and the ionic Seebeck component is suppressed even at a high humidity (90% RH) condition. The chemical treatment turns out to be a highly promising method to eliminate ionic Seebeck component in the mixed ion-electron conducting polymers and thus to generate consistent thermovoltage for the practical thermoelectric application.

Ionic Seebeck Mixed ion-electron conductor Conducting polymer PEDOT:PSS

SCI ; EI

英语

通讯

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

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000466385800002

ELSEVIER SCIENCE BV

20191006588456

Electrons ; Ionic conductivity ; Ions ; Open circuit voltage ; Thermogravimetric analysis

Conducting Materials:708.2 ; Chemistry:801

PHYSICS

Web of Science

1.Agcy Sci Technol & Res, Inst Mat Res & Engn, 2 Fusionopolis Way, Singapore 138634, Singapore
2.Guangdong Univ, Key Lab Adv Quantum Dot Displays & Lighting, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore

Kyaw, Aung Ko Ko,Wong, Grayson Dao Hwee,Yemata, Temesgen A.,et al. Effective ionic Seebeck component suppression in mixed ion-electron conductor via chemical treatment[J]. ORGANIC ELECTRONICS,2019,69:7-12.

Kyaw, Aung Ko Ko,Wong, Grayson Dao Hwee,Yemata, Temesgen A.,&Xu, Jianwei.(2019).Effective ionic Seebeck component suppression in mixed ion-electron conductor via chemical treatment.ORGANIC ELECTRONICS,69,7-12.

Kyaw, Aung Ko Ko,et al."Effective ionic Seebeck component suppression in mixed ion-electron conductor via chemical treatment".ORGANIC ELECTRONICS 69(2019):7-12.