Electric field and temperature dependent conductivity in PEDOT:PSS/PVA

Mohan, A and Menon, R (2023) Electric field and temperature dependent conductivity in PEDOT:PSS/PVA. In: Materials Science and Engineering: A, 881 .

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Abstract

The charge transport in conducting polymer blends of poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) [PEDOT:PSS] and polyvinyl alcohol (PVA) at 75, 50, 25, and 12 vol. % of PEDOT:PSS is investigated in the temperature range of 300-4.2 K. The scaling fit to percolative transport [σ ∝ |f − fc|t] shows that fc is around 10% and t = 2. The temperature dependent conductivity varies from the critical regime of metal-insulator transition to variable range hopping, along with the alterations in the networks of PEDOT:PSS in PVA. The variation in the exponent (n) in electric field dependent conductivity is more significant as the volume fraction of PEDOT:PSS decreases. The value of n decreases as the thermal contribution to transport dominates, showing the competing roles of both field and temperature.

Item Type:	Journal Article
Publication:	Materials Science and Engineering: A
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the American Institute of Physics Inc.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Nov 2023 09:22
Last Modified:	29 Nov 2023 09:22
URI:	https://eprints.iisc.ac.in/id/eprint/82899

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