A facile surface treatment utilizing binary mixtures of ammonium salts and polar solvents for multiply enhancing thermoelectric PEDOT: PSS films

Tsung Che Tsai, Tsung Han Chen, Hsiu Cheng Chang, Chun-Hua Chen, Yi Chia Huang, Wha Tzong Whang*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A novel composite recipe coupling binary mixtures of the 2-methoxyethanol (ME) solvent and ammonium salt, which has respectively proven as the electrical conductivity and Seebeck coefficient enhancers, was for the first time introduced for treating the surface of baked poly(3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films. The pristine film of PH 1000 is prepared by evenly spreading commercial PEDOT:PSS solution onto the cleaned glass substrates with a subsequent baking process. Hundred microliter of pure ME or mixtures of ME and single ammonium salt, ammonium formate (AF) or ammonium nitrate (AN), was dropped onto the baked pristine PEDOT:PSS films and then the surface coated film was spun at 2000 rpm and dried at 120°C for 1 h. The present remarkable enhancement in the resulting dimensionless figure-of-merit (ZT) is evidenced as the result of the phase separation brought by ME and the dedoping effect brought by AF, which leads to the optimization of the electrical conductivity and Seebeck coefficient, respectively.

Original languageEnglish
Pages (from-to)3303-3306
Number of pages4
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume52
Issue number23
DOIs
StatePublished - 1 Jan 2014

Keywords

  • Conducting polymer
  • Doping
  • Seebeck
  • Surface treatment
  • Thermoelectric

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