DataVXACS Applied Electronic MaterialsPaper
journal article·2019-08-27

Vertical Organic Tunnel Field-Effect Transistors

Shiyi Liu, Max L. Tietze, Akram Al-Shadeedi, Vikash Kaphle, Changmin Keum, Björn Lüssem

ACS Applied Electronic Materials· Volume 1· Issue 8
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Source abstract

Abstract

Doping organic semiconductors has become a key technology to increase the performance of organic light-emitting diodes, solar cells, or field-effect transistors (OFETs). However, doping can be used not only to optimize these devices but also to enable new design principles as well. Here, a novel type of OFET is reported—the vertical organic tunnel field-effect transistor. Based on heterogeneously doped drain and source contacts, charge carriers are injected from an n-doped source electrode into the channel by Zener tunneling and are transported toward a p-doped drain electrode. The working mechanism of these transistors is discussed with the help of a tunnel model that takes energetic broadening of transport states in organic semiconductors and roughness of organic layers into account. The proposed device principle opens new ways to optimize OFETs. It is shown that the Zener junction included between the source and drain of the vertical organic tunnel field-effect transistors suppresses short channel effects and improves the saturation of vertical OFETs.
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Research context

Electronic materials

OpenAlex topics: Advancements in Semiconductor Devices and Circuit Design · Organic Electronics and Photovoltaics · Semiconductor materials and devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Kent State University, Kent, Ohio 44240, United States

KAUST Solar Center, Physical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

Department of Microbial and Molecular Systems, Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy for Sustainable Solutions (cMACS), KU Leuven - University of Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium

Department of Physics, University of Baghdad, Al-Jadriya, Baghdad 10071, Iraq

Organic Semiconductor Centre, SUPA, School of Physics & Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom

Funding

United States-Israel Binational Science Foundation · King Abdullah University of Science and Technology · Division of Electrical, Communications and Cyber Systems

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