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논문 기본 정보

자료유형
학술저널
저자정보
Takahiro Tsukamoto (The University of Electro-Communications) Nobumitsu Hirose (National Institute of Information and Communications Technology) Akifumi Kasamatsu (National Institute of Information and Communications Technology) Toshiaki Matsui (National Institute of Information and Communications Technology) Yoshiyuki Suda (Tokyo University of Agriculture and Technology)
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.16 No.1
발행연도
2020.1
수록면
9 - 13 (5page)

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We investigate the efects of the low-temperature (LT) GeSn bufer layers on Sn surface segregation during the growth of the additional GeSn layers. Sn surface segregation was observed in the GeSn layers formed on Si substrates at the growth temperature of 300 °C. However, there was no Sn surface segregation in the GeSn layers grown at 300 °C on the LT GeSn bufer layers formed at 225 °C. The Sn surface segregation was limited by the efects of the LT bufer layers. Crystallinity of the GeSn layers grown at 300 °C on the LT GeSn bufer layers was investigated by Raman spectroscopy. The full width at half maximum of the Ge–Ge Raman spectrum obtained from the GeSn layers was about 3.1 cm−1, which means that the formed GeSn layers have excellent crystallinity. We have successfully demonstrated that the LT GeSn bufer layers can limit the Sn surface segregation, which increases the growth temperature and improves crystallinity of the GeSn layers.

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