Temperature dependence of frequency response characteristics in organic field-effect transistors

Xubing Lu, Takeo Minari, Chuan Liu, Akichika Kumatani, J. M. Liu, Kazuhito Tsukagoshi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The frequency response characteristics of semiconductor devices play an essential role in the high-speed operation of electronic devices. We investigated the temperature dependence of dynamic characteristics in pentacene-based organic field-effect transistors and metal-insulator- semiconductor capacitors. As the temperature decreased, the capacitance-voltage characteristics showed large frequency dispersion and a negative shift in the flat-band voltage at high frequencies. The cutoff frequency shows Arrhenius-type temperature dependence with different activation energy values for various gate voltages. These phenomena demonstrate the effects of charge trapping on the frequency response characteristics, since decreased mobility prevents a fast charge response for alternating current signals at low temperatures.

Original languageEnglish
Article number183308
JournalApplied Physics Letters
Volume100
Issue number18
DOIs
Publication statusPublished - 2012 Apr 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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