A drift-diffusion simulation model for organic field effect transistors: On the importance of the Gaussian density of states and traps

Mohammed Darwish, Alessio Gagliardi

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10 Scopus citations

Abstract

The nature of charge transport in organic materials depends on several important aspects, such as the description of the density of states, and the charge mobility model. Therefore specific models describing electronic properties of organic semiconductors must be considered. We have used an organic based drift-diffusion model for the electrical characterization of organic field effect transistors (OFETs) utilizing either small molecules or polymers. Furthermore, the effect of interface traps, bulk traps, and fixed charges on transistor characteristics are included and investigated. Finally, simulation results are compared to experimental measurements, and conclusions are drawn out in terms of transistor performance parameters including threshold voltages, and field-dependent mobilities.

Original languageEnglish
Article number105102
JournalJournal of Physics D: Applied Physics
Volume53
Issue number10
DOIs
StatePublished - 2020

Keywords

  • Drift diffusion
  • Mobility
  • OFET
  • Traps

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