Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
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Flexible Organic Thin-film Transistors for Photodetectors

  • Kwon, Jae-Hong (Display and Nanosystem Laboratory, College of Engineering, Korea University) ;
  • Shin, Sang-Il (Display and Nanosystem Laboratory, College of Engineering, Korea University) ;
  • Kim, Chang-Hoon (Display and Nanosystem Laboratory, College of Engineering, Korea University) ;
  • You, In-Kyu (Research Laboratory/Flexible Devices Team, Convergence and Components & Materials, Electronics and Telecommunications Research Institute) ;
  • Cho, Gyeong-Ik (Research Laboratory/Flexible Devices Team, Convergence and Components & Materials, Electronics and Telecommunications Research Institute) ;
  • Ju, Byeong-Kwon (School of Electrical Engineering, College of Engineering, Korea University)
  • Published : 20090700
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Abstract

In this paper, we report on organic thin-film transistors (OTFTs) fabricated on plastic substrates by using 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) as an organic semiconductor and cross-linked poly-4-vinylphenol as the gate dielectric. From these devices, we obtained exemplary I-V characteristics in the dark. We observed that the TIPS-pentacene-based OTFTs showed an efficient photo-current response under illumination with a halogen lamp. From these electrical properties, we found that the threshold voltage and the on-current were about -6 V and $6.65{\times}10^{-7}$ A, respectively, in the dark. However, after illumination, the threshold voltage and the on-current were 3.9 V and $1.32{\times}10^{-6}$ A, respectively.

Keywords

Acknowledgement

This work was supported by the National Research Laboratory (NRL, R0A-2007-000-20111-0) Program of the Ministry of Science and Technology (Korea Science and Engineering Foundation), Industrial-Education Cooperation Program between Korea University and L.G. Display Co. Ltd., and the IT R &D program of Ministry of Knowledge Economy of Korea (MKE, 2008-F024-01, Development of Mobile Flexible IOP Platform).

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