IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on Recent Progress in Organic Molecular Electronics
On/Off Ratio of a Pentacene Field-Effect Transistor with a Discontinuous MoO3 Layer
Takumi KOBAYASHIMasahiro MINAGAWAAkira BABAKeizo KATOKazunari SHINBO
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2023 Volume E106.C Issue 6 Pages 214-219

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Abstract

Improvement of the on/off ratio in organic field-effect transistors through the use of pentacene and molybdenum trioxide (MoO3) layers was attempted via the preparation of a discontinuous MoO3 layer using a mesh mask. We prepared three types of devices. Device A had a conventional top-contact structure with an n-type Si wafer and a 200-nm-thick SiO2 film onto which we deposited a 70-nm-thick pentacene film and a 30-nm-thick layer of Au top electrodes. Devices B and C had a similar structure to device A but received a continuous and a discontinuous MoO3 layer, respectively. The off current in Device B was remarkably high; in contrast, the off current in Device C was reduced and dependent on the separation of the MoO3 layer. It was deduced that the high resistance of the area without MoO3 contributed to the reduced off current.

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© 2023 The Institute of Electronics, Information and Communication Engineers
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