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

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

doi:10.1039/c4ta01839g

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

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

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article

46 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	13380-13387
Number of pages	8
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	33
DOIs	https://doi.org/10.1039/c4ta01839g
Publication status	Published - 2014 Sep 7

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All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

Cite this

Lee, S. H., Park, H., Son, W., Choi, H. H., & Kim, J. H. (2014). Novel solution-processable, dedoped semiconductors for application in thermoelectric devices. Journal of Materials Chemistry A, 2(33), 13380-13387. https://doi.org/10.1039/c4ta01839g

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abstract = "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",

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10.1039/c4ta01839g