Pentacene-based ambipoalr organic transistors with improve n-channel characteristics using polyethylenimine as a buffer layer

P. T. Tseng, B. Y. Huang, B. R. Lin, W. Y. Chou, H. L. Cheng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we investigated pentacene-based ambipolar organic transistors using a linear polyethylenimine (LPEI) as gate dielectric buffer layer. We found that introducing an insulating LPEI layer between the pentacene active channel and the polymethylmetacrylate gate dielectric layer could enhance the n-channel electrical characteristics, such as early-on threshold voltage (Vth), sharp subthreshold swing (SS), and enlarged on/off current ratio, despite the surface of the LPEI layer disfavoring the growth of the high-quality pentacene active layer. These results were supported by frequency-dependent conductivity measurements, that is, the decreased interfacial trap density and mean interface trap time constant of the devices with the LPEI layer. In summary, the LPEI layer could improve the n-channel characteristics of pentacene-based ambipolar organic transistors to make them suitable for a vast range of potential applications.

Original languageEnglish
Title of host publicationAM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages179-182
Number of pages4
ISBN (Electronic)9784990875336
Publication statusPublished - 2017 Aug 8
Event24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017 - Kyoto, Japan
Duration: 2017 Jul 42017 Jul 7

Publication series

NameAM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings

Other

Other24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017
CountryJapan
CityKyoto
Period17-07-0417-07-07

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computational Theory and Mathematics

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