Journal of the Institute of Electronics Engineers of Korea SD (대한전자공학회논문지SD)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Fabrication of Pixel Array using Pentacene TFT and Organic LED

펜타센 TFT와 유기 LED로 구성된 픽셀 어레이 제작

  • Choe Ki Beom (Dept. of Electronics and Computer Engineering, DongA University) ;
  • Ryu Gi Seong (Dept. of Electronics and Computer Engineering, DongA University) ;
  • Jung Hyun (Dept. of Electronics and Computer Engineering, DongA University) ;
  • Song Chung Kun (Dept. of Electronics and Computer Engineering, DongA University)
  • 최기범 (동아대학교 전자공학과) ;
  • 류기성 (동아대학교 전자공학과) ;
  • 정현 (동아대학교 전자공학과) ;
  • 송정근 (동아대학교 전자공학과)
  • Published : 2005.12.01
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Abstract

In this paper, we fabricated a pixel array in which each pixel was consisted of Organic Thin Film Transistor (OTFT) serially connected with Organic Light Emitting Diode (OLED) on Poly-ethylene-terephthalate (PET) substrate and the number of pixels was 64 x 64. As a gate insulator of OTFT, the thermally cross-linked PVP was used and the organic semiconductor, Pentacene, is deposited for an active layer of OTFT considering the compatibility with PET substrate. The mobility of OTFT is $1.0\;cm^2/V{\cdot}sec$ as a discrete device, but it was reduced to $0.1\~0.2\;cm^2/V{\codt}sec$ in the array. We analyzed the operation of the array and confirmed the current driving ability of OTFTs for the OLEDs.

본 논문에서는 Poly-ethylene-terephthalate (PET) 기판 위에 Organic Thin Film Transistor (OTFT)와 Organic Light Emitting Diode (OLED)를 직렬 연결시킨 픽셀과 64 x 64 픽셀로 구성된 어레이를 제작하여 동작을 시연하였다. OTFT는 PET 기판과의 호환성을 고려하여 Poly 4-vinylphenol을 게이트 절연체로, 펜타센을 활성층으로 사용하여 제작되었다. 개별 소자 수준에서는 이동도가 $1.0\;cm^2/V{\cdot}sec$로 나타났으나, 어레이에서는 $0.1\~0.2\;cm^2/V{\cdot}sec$로 약 10배 정도 감소하였다. 어레이의 동작을 분석하였고 OTFT의 OLED에 대한 전류구동능력을 확인하였다.

Keywords

References

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