Simultaneous improvement in electrical conductivity and Seebeck coefficient of PEDOT:PSS by N-2 pressure-induced nitric acid treatment

Myint, May Thu Zar1; Hada, Masaki1; Inoue, Hirotaka1; Marui, Tatsuki1; Nishikawa, Takeshi1; Nishina, Yuta1; Ichimura, Susumu2; Umeno, Masayoshi3; Kyaw, Aung Ko Ko4,5; Hayashi, Yasuhiko1

2018

10.1039/c8ra06094k

RSC Advances   影响因子和分区

2046-2069

As a thermoelectric (TE) material suited to applications for recycling waste-heat into electricity through the Seebeck effect, poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid) (PEDOT:PSS) is of great interest. Our research demonstrates a comprehensive study of different post-treatment methods with nitric acid (HNO3) to enhance the thermoelectric properties of PEDOT:PSS. The optimum conditions are obtained when PEDOT:PSS is treated with HNO3 for 10 min at room temperature followed by passing nitrogen gas (N-2) with a pressure of 0.2 MPa. Upon this treatment, PEDOT:PSS changes from semiconductor-like behaviour to metal-like behaviour, with a simultaneous enhancement in the electrical conductivity and Seebeck coefficient at elevated temperature, resulting in an increase in the thermoelectric power factor from 0.0818 to 94.3 W m(-1) K-2 at 150 degrees C. The improvement in the TE properties is ascribed to the combined effects of phase segregation and conformational change of the PEDOT due to the weakened coulombic attraction between PEDOT and PSS chains by nitric acid as well as the pressure of the N-2 gas as a mechanical means.

SCI ; EI

英语

通讯

Shenzhen Peacock Team Project[KQTD2016030111203005]

Chemistry

Chemistry, Multidisciplinary

WOS:000449704100020

ROYAL SOC CHEMISTRY

20184606073049

Electric conductivity ; Nitric acid ; Seebeck coefficient ; Thermoelectric power ; Waste heat

Energy Losses (industrial and residential):525.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Conducting Materials:708.2 ; Inorganic Compounds:804.2

Web of Science

1.Okayama Univ, Grad Sch Nat Sci & Technol, Kita Ku, 3-1-1 Tsushima Naka, Okayama 7008530, Japan
2.Nagoya Ind Promot Corp, Atsuta Ku, 3-4-41 Rokuban, Nagoya, Aichi 4560058, Japan
3.Cs Techno Inc, Moriyama Ku, Nagoya, Aichi 4630003, Japan
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
5.Shenzhen Planck Innovat Technol Pte Ltd, Ganli 6th Rd, Shenzhen 518112, Peoples R China

Myint, May Thu Zar,Hada, Masaki,Inoue, Hirotaka,et al. Simultaneous improvement in electrical conductivity and Seebeck coefficient of PEDOT:PSS by N-2 pressure-induced nitric acid treatment[J]. RSC Advances,2018,8(64):36563-36570.

Myint, May Thu Zar.,Hada, Masaki.,Inoue, Hirotaka.,Marui, Tatsuki.,Nishikawa, Takeshi.,...&Hayashi, Yasuhiko.(2018).Simultaneous improvement in electrical conductivity and Seebeck coefficient of PEDOT:PSS by N-2 pressure-induced nitric acid treatment.RSC Advances,8(64),36563-36570.

Myint, May Thu Zar,et al."Simultaneous improvement in electrical conductivity and Seebeck coefficient of PEDOT:PSS by N-2 pressure-induced nitric acid treatment".RSC Advances 8.64(2018):36563-36570.