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

Autor: Zar Myint MT; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Hada M; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Inoue H; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Marui T; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Nishikawa T; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Nishina Y; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp., Ichimura S; Nagoya Industries Promotion Corporation 3-4-41 Rokuban, Atsuta Nagoya 456-0058 Japan., Umeno M; C's Techno. Inc. Anagahora, Shimoshidami, Moriyama Nagoya 463-0003 Japan., Ko Kyaw AK; Department of Electrical and Electronic Engineering, Southern University of Science and Technology Shenzhen 518055 P. R. China aung@sustc.edu.cn.; Shenzhen Planck Innovation Technologies Pte Ltd Ganli 6th Road, Longgang Shenzhen 518112 China., Hayashi Y; Graduate School of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita Okayama 700-8530 Japan hayashi.yasuhiko@okayama-u.ac.jp.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2018 Oct 30; Vol. 8 (64), pp. 36563-36570. Date of Electronic Publication: 2018 Oct 30 (Print Publication: 2018).
DOI: 10.1039/c8ra06094k
Abstrakt: 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 (HNO 3 ) to enhance the thermoelectric properties of PEDOT:PSS. The optimum conditions are obtained when PEDOT:PSS is treated with HNO 3 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 μW m -1 K -2 at 150 °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.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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