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Proceedings Paper

Organic vertical field effect transistors: Achieving high on-off ratio and vertical integration with OLEDs (Presentation Recording)
Author(s): Hyukyun Kwon; Mincheol Kim; Hyunsu Cho; Seunghyup Yoo
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Paper Abstract

Organic vertical field effect transistors (VFETs) have been explored to enhance the output current level and device operation speed due to the inherent low carrier mobility of organic semiconductors. However, most of VFETs reported to date involve a complex source electrode patterning process owing to their operation mechanism. Here, we investigate on VFETs based on C60 that do not require complex source electrode patterning process by insulting the top surface of a source electrode embedded in C60 layer [1]. In a VFET structure studied in this work, current flow is controlled by the electric field between a gate and a source electrode embedded within an active layer which is called bottom active layer. Based on its operation mechanism, several geometrical parameters such as (i) bottom active layer thickness; (ii) presence of a charge blocking layer and its thickness ensuring insulating properties; and (iii) the width of electrodes are identified as key factors influencing device performance. Through the device optimization with these parameters, the proposed organic VFETs exhibit a large on/off ratio of 6×10^5 and output current that is greater than that of a conventional C60 based OTFT with a similar device dimension. In order to show the benefit of VFETs, a single-pixel organic light-emitting diode (OLED) is integrated vertically with the VFETs under study.

Paper Details

Date Published: 5 October 2015
PDF: 1 pages
Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 956810 (5 October 2015); doi: 10.1117/12.2187390
Show Author Affiliations
Hyukyun Kwon, KAIST (Korea, Republic of)
Mincheol Kim, KAIST (Korea, Republic of)
Hyunsu Cho, KAIST (Korea, Republic of)
Seunghyup Yoo, KAIST (Korea, Republic of)

Published in SPIE Proceedings Vol. 9568:
Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII
Ioannis Kymissis; Iain McCulloch; Ruth Shinar; Oana D. Jurchescu; Luisa Torsi, Editor(s)

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