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논문 기본 정보

자료유형
학술저널
저자정보
Ham, Giyul (Department of Materials Science and Engineering, Hanyang University) Shin, Seokyoon (Department of Materials Science and Engineering, Hanyang University) Lee, Juhyun (Department of Materials Science and Engineering, Hanyang University) Lee, Namgue (Department of Nanoscale Semiconductor Engineering, Hanyang University) Jeon, Hyeongtag (Department of Materials Science and Engineering, Hanyang University)
저널정보
한국반도체디스플레이기술학회 반도체디스플레이기술학회지 반도체디스플레이기술학회지 제17권 제3호
발행연도
2018.1
수록면
41 - 45 (5page)

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Two-dimensional (2D) materials have been studied extensively due to their excellent physical, chemical, and electrical properties. Among them, we report the material and device characteristics of tin disulfide ($SnS_2$). To apply $SnS_2$ as a channel layer in a transistor, $SnS_2$ channels were formed by a stripping method and a transfer method. The limitation of this method is that it is difficult to produce uniform device characteristics over a large area. Therefore, we directly deposited $SnS_2$ by atomic layer deposition (ALD) and then performed lithography. This method was able to produce devices with repeatable characteristics over a large area. However, the $SnS_2$ film was damaged by the acetone used as a photoresist (PR) developer during the lithography process, with the electrical properties of mobility of $2.6{\times}10^{-4}cm^2/Vs$, S.S. of 58.1 V/decade, and on/off current ratio of $1.8{\times}10^2$. These results are not suitable for advanced electronic devices. In this study, we analyzed the effect of acetone on $SnS_2$ and studied the device process to prevent such damage. Using polyvinyl alcohol (PVA) as a passivation layer during the lithography process, the electrical characteristics of the $SnS_2$ transistor had $2.11{\times}10^{-3}cm^2/Vs$ of mobility, 11.3 V/decade of S.S, and $2.5{\times}10^3$ of the on/off current ratio, which were 10x improvements to the $SnS_2$ transistor fabricated by the conventional method.

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