NDLI: Enhanced thermoelectric properties of sorbitol-mixed PEDOT:PSS thin films by chemical reduction

Content Provider	Springer Nature Link
Author	Yang, Eunho Kim, Jaeyun Jung, Byung Jun Kwak, Jeonghun
Copyright Year	2015
Abstract	This study systematically examined the thermoelectric (TE) properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films by enhancing the electrical conductivity with D-sorbitol and by controlling the oxidation level with tetrakis (dimethylamino) ethylene (TDAE) vapor treatment. Mixing sorbitol into PEDOT:PSS changed the morphology of the films, increasing the electrical conductivity up to 722.06 S cm$^{−1}$, which is over two orders of magnitude higher than that of pristine PEDOT:PSS (1.53 S cm$^{−1}$). For even better TE properties, we subsequently exposed the films to TDAE vapor (which is a well-known reducing agent) for various treatment times to control their oxidation levels. The difference in the redox state as a function of the reduction time was easily identified by the naked eye owing to the electrochromic properties of PEDOT:PSS. As a result, we obtained a high power factor of 22.28 μW m$^{−1}$ K$^{−2}$ from the sorbitol-mixed PEDOT:PSS thin films that were treated via chemical reduction. This value is three times higher than that of devices without TDAE treatment (7.26 μW m$^{−1}$ K$^{−2}$). The properties and changes in the films fabricated with sorbitol and TDAE treatments were characterized by atomic force microscopy and UV–Vis-NIR absorption.
Starting Page	2838
Ending Page	2843
Page Count	6
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	26
Issue Number	5
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2015-01-30
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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