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DRASTIC CHANGE IN THE GaN FILM QUALITY BY IN-SITU CONTROLLING SURFACE RECONSTRUCTIONS IN GSMBE

机译:通过原位控制GSMBE中的表面重构来使GaN膜质量发生剧烈变化

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摘要

GaN growth was performed on 6H-SiC (0001) substrates by gas-source molecular beam epitaxy (GSMBE), using ammonia (NH_3) as a nitrogen source. Two kinds of reflection high-energy electron diffraction (RHEED) patterns, named (1×1) and (2×2), were observed during the GaN growth depending on the growth conditions. By careful RHEED study, it was verified that the (1×1) pattern was corresponded to a H_2-related nitrogen-rich surface, while (2×2) pattern was resulted from a Ga-rich surface. By x-ray diffraction (XRD), photoluminescence (PL) and atomic force microscopy (AFM) characterizations, it was found that the GaN quality changed drastically grown under different RHEED patterns. GaN film grown under the (1×1) RHEED pattern showed much better qualities than that grown under the (2×2) one.
机译:使用气态分子束外延(GSMBE),以氨(NH_3)为氮源,在6H-SiC(0001)衬底上进行GaN生长。根据生长条件,在GaN生长期间观察到两种反射高能电子衍射(RHEED)图案,分别为(1×1)和(2×2)。通过仔细的RHEED研究,证实(1×1)模式对应于H_2相关的富氮表面,而(2×2)模式则源自富Ga表面。通过X射线衍射(XRD),光致发光(PL)和原子力显微镜(AFM)表征,发现GaN质量在不同的RHEED模式下急剧变化。在(1×1)RHEED模式下生长的GaN膜的质量比在(2×2)模式下生长的GaN膜更好。

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  • 来源
    《Nitride semiconductors》|1997年|223-226|共4页
  • 会议地点 Boston MA(US)
  • 作者单位

    The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-Shi, Saitama, 351-01 Japan;

    The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-Shi, Saitama, 351-01 Japan;

    The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-Shi, Saitama, 351-01 Japan;

    The Institute of Physical and Chemical Research (RIKEN), Hirosawa 2-1, Wako-Shi, Saitama, 351-01 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 材料;
  • 关键词

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