Novel solution-processable, dedoped semiconductors for application in thermoelectric devices

Seung Hwan Lee, Hongkwan Park, Woohyun Son, Hyang Hee Choi, Jung Hyun Kim

Research output: Contribution to journalArticlepeer-review

94 Citations (Scopus)


The thermoelectric performance of poly(3,4-ethylenedioxythiophene) complexed with a poly(4-styrenesulfonic acid) (PEDOT:PSS) film was enhanced by a three-step process. First, ultrafiltration was applied to remove non-complexed PSS from PEDOT:PSS grains. The ultrafiltration treatment leads to an improvement in the power factor (S2σ) from 54.9 to 83.2 μW m -1 K-2 and a decrease in the thermal conductivity (κ) from 0.330 to 0.170 W m-1 K-1. Second, the fully de-doped PEDOT:PSS solution was prepared by addition of hydrazine, which acted as a reducing agent. Third, the two PEDOT:PSS solutions (ultrafiltered and hydrazine-treated) were mixed in different ratios by simple ultrasonication blending without any post-treatment. The optimal S2σ value of 115.5 μW m-1 K-2 (∼10 times higher than that of the pristine PEDOT:PSS film) and ZT value of 0.2 were recorded at 33 wt% of the hydrazine-treated, ultrafiltered PEDOT:PSS in the blend. This journal is

Original languageEnglish
Pages (from-to)13380-13387
Number of pages8
JournalJournal of Materials Chemistry A
Issue number33
Publication statusPublished - 2014 Sept 7

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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