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논문 기본 정보

자료유형
학술저널
저자정보
Shin, Chang-Ho (School of Materials Science and Engineering, University of Ulsan) Chae, Joo-Hyun (Technical Institute, New Optics Ltd.) Kim, Yu-Sung (Technical Institute, New Optics Ltd.) Jeong, Cheol-Woo (School of Materials Science and Engineering, University of Ulsan) Kim, Dae-Il (School of Materials Science and Engineering, University of Ulsan)
저널정보
한국재료학회 한국재료학회지 한국재료학회지 제20권 제5호
발행연도
2010.1
수록면
267 - 270 (4page)

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Sn doped $In_2O_3$ (ITO) and ITO/Cu/ITO (ICI) multilayer films were prepared on glass substrates with a reactive radio frequency (RF) magnetron sputter without intentional substrate heating, and then the influence of the Cu interlayer on the methanol gas sensitivity of the ICI films were considered. Although both ITO and ICI film sensors had the same thickness of 100 nm, the ICI sensors had a sandwich structure of ITO 50 nm/Cu 5 nm/ITO 45 nm. The ICI films showed a ten times higher carrier density than that of the pure ITO films. However, the Cu interlayer may also have caused the decrement of carrier mobility because the interfaces between the ITO and Cu interlayer acted as a barrier to carrier movement. Although the ICI films had two times a lower mobility than that of the pure ITO films, the ICI films had a higher conductivity of $3.6{\cdot}10^{-4}\;{\Omega}cm$ due to a higher carrier density. The changes in the sensitivity of the film sensors caused by methanol gas ranging from 50 to 500 ppm were measured at room temperature. The ICI sensors showed a higher gas sensitivity than that of the ITO single layer sensors. Finally, it can be concluded that the ICI film sensors have the potential to be used as improved methanol gas sensors.

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