Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Effects of the Optical Characteristics of Backlight Sources on the Photo Leakage Currents of a-Si:H Thin Film Transistor

비정질 실리콘 TFT의 광누설 전류에 Backlight 광원의 광학적 특성이 미치는 영향에 대한 연구

  • Published : 2008.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

The photo leakage currents of a conventional hydrogenated amorphous silicon(a-Si:H) thin film transistor(TFT) were investigated and analyzed in case of illumination from various light sources such as halogen lamp, cold cathode fluorescent lamp(CCFL) backlight, and white light emitting diode(LED) backlight. The photo leakage characteristics showed the apparent differences in the leakage level and in the $I_{on}/I_{off}$ ratio in spite of the similar luminances of light sources. This leakage level is expected to be related to the wavelength of the lowest intensity peak from the spectral characteristics of light sources.

Keywords

References

  1. J. K. Yoon, Y. H. Jang, B. K. Kim, H. S Hong, B. C. Ahn, and C. Lee, "Voltage dependence of off current in a-Si:H TFT under backlight illumination", J. Non- CtystSolids., Vol. 164-166, p. 747, 1993 https://doi.org/10.1016/0022-3093(93)91105-C
  2. J. H. Choi, C. S. Kim, B. C. Lim, and J. Jang, "A novel thin film transistor using double amorphous silicon activelayer", IEEE ED, Vol. 45, No. 9, p. 2074, 1998 https://doi.org/10.1109/16.711377
  3. K. W. Kim, K. S. Cho, and J. Jang, "Performance improvement of polycrystalline thin-film transistor by adopting a very thin amorphous silicon buffer", J. Non-Cryst. Solids, Vol. 266-269, p. 1265, 2000 https://doi.org/10.1016/S0022-3093(99)00935-7
  4. J. I. Ryu, Y. J. Choi, I. K. Woo, B. C. Lim, and J. Jang, "High performance a-Si TFT with ITO/n+ ohmic layer using a Ni- silicide", J. Non-Cryst. Solids., Vol. 266-269, p. 1310, 2000 https://doi.org/10.1016/S0022-3093(00)00044-2
  5. M. J. Powell, "The physics of amorphous- silicon thin-film transistors", IEEE ED, Vol. 36, No. 12, p. 2753, 1989 https://doi.org/10.1109/16.40933
  6. E. S. Yang, "Microelectronics Devices", MaGraw-Hill, p. 357, 1994

Cited by

  1. A Study on the Photon Energy Spectrums of Backlight for the Analysis of the Photoelectric Characteristics of a-Si:H TFT vol.22, pp.12, 2009, https://doi.org/10.4313/JKEM.2009.22.12.1058