Organic Field-Effect Transistors Based on a Liquid-Crystalline Polymeric Semiconductor using SU-8 Gate Dielectrics onFlexible Substrates
File(s)materials-07-07226.pdf (1.36 MB)
Published version
Author(s)
Tetzner, K
Bose, I
Bock, K
Type
Journal Article
Abstract
In this work, the insulating properties of poly(4-vinylphenol) (PVP) and SU-8
(MicroChem, Westborough, MA, USA) dielectrics are analyzed and compared with each
other. We further investigate the performance behavior of organic field-effect transistors
based on a semiconducting liquid-crystal polymer (LCP) using both dielectric materials
and evaluate the results regarding the processability. Due to the lower process temperature
needed for the SU-8 deposition, the realization of organic transistors on flexible substrates
is demonstrated showing comparable charge carrier mobilities to devices using PVP on
glass. In addition, a µ-dispensing procedure of the LCP on SU-8 is presented, improving
the switching behavior of the organic transistors, and the promising stability data of the
SU-8/LCP stack are verified after storing the structures for 60 days in ambient air showing
negligible irreversible degradation of the organic semiconductor.
(MicroChem, Westborough, MA, USA) dielectrics are analyzed and compared with each
other. We further investigate the performance behavior of organic field-effect transistors
based on a semiconducting liquid-crystal polymer (LCP) using both dielectric materials
and evaluate the results regarding the processability. Due to the lower process temperature
needed for the SU-8 deposition, the realization of organic transistors on flexible substrates
is demonstrated showing comparable charge carrier mobilities to devices using PVP on
glass. In addition, a µ-dispensing procedure of the LCP on SU-8 is presented, improving
the switching behavior of the organic transistors, and the promising stability data of the
SU-8/LCP stack are verified after storing the structures for 60 days in ambient air showing
negligible irreversible degradation of the organic semiconductor.
Date Issued
2014-10-29
Date Acceptance
2014-10-15
Citation
Materials, 2014, 7 (11), pp.7226-7242
ISSN
1996-1944
Publisher
MDPI
Start Page
7226
End Page
7242
Journal / Book Title
Materials
Volume
7
Issue
11
Copyright Statement
© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article
distributed under the terms and conditions of the Creative Commons Attribution license
(http://creativecommons.org/licenses/by/4.0/).
distributed under the terms and conditions of the Creative Commons Attribution license
(http://creativecommons.org/licenses/by/4.0/).
License URL
Subjects
liquid-crystal polymers
organic field-effect transistors
organic semiconductor
long-term stability
Publication Status
Published