Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Investigation of Transparent Conductive Oxide Films Deposited by Co-sputtering of ITO and AZO

ITO와 AZO 동시 증착법으로 제조된 투명전도막의 특성 연구

  • Kim, Dong-Ho (Functional Coatings Research Group, Korea Institute of Materials Science(KIMS)) ;
  • Kim, Hye-Ri (Functional Coatings Research Group, Korea Institute of Materials Science(KIMS)) ;
  • Lee, Sung-Hun (Functional Coatings Research Group, Korea Institute of Materials Science(KIMS)) ;
  • Byon, Eung-Sun (Functional Coatings Research Group, Korea Institute of Materials Science(KIMS)) ;
  • Lee, Gun-Hwan (Functional Coatings Research Group, Korea Institute of Materials Science(KIMS))
  • 김동호 (재료연구소 기능박막연구그룹) ;
  • 김혜리 (재료연구소 기능박막연구그룹) ;
  • 이성훈 (재료연구소 기능박막연구그룹) ;
  • 변응선 (재료연구소 기능박막연구그룹) ;
  • 이건환 (재료연구소 기능박막연구그룹)
  • Published : 2009.06.30
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Abstract

Transparent conducting thin films of indium tin oxide(ITO) co-sputtered with aluminum-doped zinc oxide(AZO) were deposited on glass substrate by dual magnetron sputtering. It was found that the electrical properties and structural characteristics of the films are significantly changed according to the sputtering power of the AZO target. The IAZTO film prepared with D.C power of ITO at 100 W and R.F power of AZO at 50 W shows an electrical resistivity of $4.6{\times}10^{-4}{\Omega}{\cdot}cm$ and a sheet resistance of $30{\Omega}/{\square}$ (for 150 nm thick). Besides of the improvement of the electrical properties, compared to the ITO films deposited at the same process conditions, the IAZTO films have very smooth surface, which is due to the amorphous nature of the films. However, the electrical conductivity of the IAZTO films was found to be deteriorated along with the crystallization in case of the high temperature deposition (above $310^{\circ}C$). In this work, high quality amorphous transparent conductive oxide layers could be obtained by mixing AZO with ITO, indicating possible use of IAZTO films as the transparent electrodes in OLED and flexible display devices.

Keywords

References

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