Issue 39, 2023

A temperature dependent power-law drain current model for coplanar OFETs

Abstract

We present a drain current model for coplanar organic field-effect transistors (OFETs) considering temperature dependent power-law mobility and contact resistance. By solving a microscopic two-dimensional equivalent circuit model, we demonstrate that the power-law dependence of mobility on the gate voltage leads to the asymptotic power-law dependence of the contact resistance. Furthermore, we validated the model by measuring the transfer characteristics of pentacene-based coplanar OFETs in a wide temperature range between 293 K and 373 K. We study the temperature dependence of the characteristic temperature on the power-law exponent and the on-state resistance. We showed that the characteristic temperature is independent of the temperature and the on-state resistance follows an inverse Arrhenius-type law.

Graphical abstract: A temperature dependent power-law drain current model for coplanar OFETs

Article information

Article type
Paper
Submitted
21 juil. 2023
Accepted
07 sept. 2023
First published
07 sept. 2023

J. Mater. Chem. C, 2023,11, 13579-13585

A temperature dependent power-law drain current model for coplanar OFETs

J. Park, Y. Lee, G. Horowitz, S. Jung and Y. Bonnassieux, J. Mater. Chem. C, 2023, 11, 13579 DOI: 10.1039/D3TC02576D

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