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Russian Physics Journal

, Volume 62, Issue 1, pp 90–99 | Cite as

Electrophysical Characteristics of the Pentacene-based MIS Structures with a SiO2 Insulator

  • V. A. NovikovEmail author
  • A. V. Voitsekhovskii
  • S. N. Nesmelov
  • S. M. Dzyadukh
  • T. N. Kopylova
  • K. M. Degtyarenko
  • E. V. Chernikov
  • V. M. Kalygina
Article
  • 13 Downloads

In a wide range of frequencies and temperatures, the admittance of MIS structures based on pentacene organic films, formed by thermal evaporation in vacuum on SiO2 and SiO2/Ga2O3 substrates, was experimentally investigated. The capacitance-voltage characteristics of MIS structures with a SiO2 insulator have virtually no hysteresis. It is shown that at temperatures of 150–300 K, an inversion layer is formed in the structures at large positive bias voltages. The concentration of holes in pentacene, determined from the capacitive measurements, exceeds 1018 cm–3 and is practically independent of temperature and frequency. The experimental frequency dependences of the admittance of MIS structures with the SiO2 insulator are in good agreement with the results of calculations performed using the method of equivalent circuits. For structures with a Ga2O3 layer, the negative differential conductance of the insulating layer was detected, which requires the complication of the equivalent circuit. The possibility of using the low-temperature admittance measurements for studying the traps in the pentacene film bulk is shown.

Keywords

organic semiconductor pentacene MIS structure SiO2 Ga2O3 admittance equivalent circuits low-temperature measurements inversion layer bulk traps 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • V. A. Novikov
    • 1
    Email author
  • A. V. Voitsekhovskii
    • 1
    • 2
  • S. N. Nesmelov
    • 1
  • S. M. Dzyadukh
    • 1
  • T. N. Kopylova
    • 2
  • K. M. Degtyarenko
    • 2
  • E. V. Chernikov
    • 2
  • V. M. Kalygina
    • 1
  1. 1.National Research Tomsk State UniversityTomskRussia
  2. 2.V. D. Kuznetsov Siberian Physical-Technical Institute at Tomsk State UniversityTomskRussia

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