Applied Physics A

, 124:547 | Cite as

Vertical organic field effect transistor: on–off state definition related to ambipolar gate biasing

  • Keli F. Seidel
  • Lucieli Rossi
  • Diana Jastrombek
  • Hypolito J. Kalinowski


We investigated a vertical organic field effect transistor (VOFET) behavior with an intermediate electrode formed by a tin (Sn) layer, whose growth presents a self-organized pattern grid with natural pores, fundamental to its operation. The choose of the materials to compose the channel formed by a fullerene (\(\text {C}_{60}\)) and a intermediate electrode of Sn brings a structure able to work with very low voltage and ambipolar gate biasing behavior, concomitantly. A explanation based on the importance of the roughness/pores in the intermediate electrode and the control of the energy barrier of the injection interface clarifies how to obtain the on–off state in unipolar VOFETs with ambipolar gate biasing. A theoretical basis support that when there is a low injection energy barrier inside and outside of the pores from a roughness intermediate electrode the electrical characterization its a combination of a very low voltage operation with a non negligible off-output current.



The authors would like to thank CNPq and CAPES for financial support, Prof. Ivo. A. Hümmelgen (Universidade Federal do Parana) by the device development facilities and Center for Electronic Microscopy (CME-UFPR) by AFM facilities. We would like to thanks also Prof. Emil J.W. List-Kratochvil (Humboldt-Universität zu Berlin) for fruitful discussions and valuable suggestions.


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© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of PhysicsFederal University of Technology, ParanáCuritibaBrazil
  2. 2.Department of Forestry Engineering and TechnologyFederal University of ParanáCuritibaBrazil
  3. 3.Graduate School on Electrical Engineering and Computer ScienceFederal University of Technology, ParanáCuritibaBrazil
  4. 4.Departamento de Engenharia de TelecomunicaçõesUniversidade Federal FluminenseNiteróiBrazil

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