Organic Field-Effect Transistors Based on a Liquid-Crystalline Polymeric Semiconductor using SU-8 Gate Dielectrics on Flexible Substrates

Materials

Kornelius Tetzner¹  Indranil R. Bose²  Karlheinz Bock³ 

[1] Research Center for Microperipheric Technologies, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany;Fraunhofer Research Institution for Modular Solid State Technologies EMFT, Hansastr. 27d, 80686 Munich, Germany; E-Mail:;Electronics Packaging Lab (IAVT), Technische Universität Dresden, Helmholtzstr. 10, 01069 Dresden, Germany; E-Mail:

关键词: liquid-crystal polymers;    organic field-effect transistors;    organic semiconductor;    long-term stability;   

DOI  :  10.3390/ma7117226

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.