NDLI: Thermoelectric Power-Generation Characteristics of PEDOT:PSS Thin-Film Devices with Different Thicknesses on Polyimide Substrates

Content Provider	Springer Nature Link
Author	An, Hiroaki Nishinaka, Takahiko Hokazo, Masahiro Oshima, buaki Toshima, Naoki
Copyright Year	2015
Abstract	We fabricated cast films of complexes of poly(3,4-ethylenedioxythiophene) and polystyrene sulfonic acid (PEDOT:PSS) at various thicknesses, t = 3–20 μm, on flexible polyimide substrates, and studied their thermoelectric properties. We also fabricated in-plane film devices consisting of five couples of PEDOT:PSS and Ag electrodes, measuring their output power characteristics as a function of film thickness. The Seebeck coefficient and electrical conductivity of a PEDOT:PSS film with a thickness of ∼20 μm on a polyimide substrate were ∼15 μV/K and 500 S/cm, respectively, near room temperature. As the film thickness decreased from ∼10 μm to 3 μm, the electrical conductivity increased remarkably to 1200 S/cm, while the Seebeck coefficient remained almost constant with film thickness. The maximum electric power for an in-plane PEDOT:PSS film device with a thickness of 10 μm was 1.3 μW at ΔT = 100 K. Its open-circuit voltage was 7.3 mV, and its internal resistance was 11 Ω. The measured power-generation characteristics of the film device agreed with values estimated from the dependence of thermoelectric properties on film thickness for PEDOT:PSS films on polyimide substrates. Assuming single PEDOT:PSS legs, defined as the direction of heat transport, we estimated the expected electrical power density at ΔT = 100 K as ∼650 μW/cm$^{2}$ for a film thickness t = 10 μm, and 1400 μW/cm$^{2}$ for t = 3 μm.
Starting Page	2105
Ending Page	2112
Page Count	8
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	44
Issue Number	6
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2015-02-24
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Conducting polymer PEDOT:PSS thermoelectric device power-generation characteristics film thickness dependence Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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