Effect of spatial inhomogeneity of charge carrier mobility on current-voltage characteristics in organic field-effect transistors

Juliusz Sworakowski*, Urszula Bielecka, Petro Lutsyk, Krzysztof Janus

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A semi-quantitative model is put forward elucidating the role of spatial inhomogeneity of charge carrier mobility in organic field-effect transistors. The model, based on electrostatic arguments, allows estimating the effective thickness of the conducting channel and its changes in function of source-drain and gate voltages. Local mobility gradients in the direction perpendicular to the insulator/semiconductor interface translate into voltage dependences of the average carrier mobility in the channel, resulting in positive or negative deviations of current-voltage characteristics from their expected shapes. The proposed effect supplements those described in the literature, i.e., density-dependent mobility of charge carriers, short-channel effects, and contribution of contact resistance.

Original languageEnglish
Pages (from-to)56-61
Number of pages6
JournalThin Solid Films
Volume571
Issue numberPart 1
Early online date5 Oct 2014
DOIs
Publication statusPublished - 28 Nov 2014

Fingerprint

Organic field effect transistors
Carrier mobility
Current voltage characteristics
carrier mobility
Charge carriers
charge carriers
inhomogeneity
field effect transistors
Electric potential
electric potential
Contact resistance
Electrostatics
supplements
Semiconductor materials
contact resistance
estimating
insulators
electrostatics
deviation
conduction

Keywords

  • charge carrier mobility
  • current-voltage characteristics
  • organic field-effect transistor

Cite this

Sworakowski, Juliusz ; Bielecka, Urszula ; Lutsyk, Petro ; Janus, Krzysztof. / Effect of spatial inhomogeneity of charge carrier mobility on current-voltage characteristics in organic field-effect transistors. In: Thin Solid Films. 2014 ; Vol. 571, No. Part 1. pp. 56-61.
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Effect of spatial inhomogeneity of charge carrier mobility on current-voltage characteristics in organic field-effect transistors. / Sworakowski, Juliusz; Bielecka, Urszula; Lutsyk, Petro; Janus, Krzysztof.

In: Thin Solid Films, Vol. 571, No. Part 1, 28.11.2014, p. 56-61.

Research output: Contribution to journalArticle

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