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OBSERVATION OF NATIVE Ga VACANCIES IN GaN BY POSITRON ANNIHILATION

机译:正电子AN没法观察GaN中的天然Ga空位

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摘要

Positron annihilation experiments have been performed to identify native point defects in GaN bulk crystals as well as in epitaxial layers. The results show that Ga vacancies are present at concentrations of 10~(17) - 10~(18) cm~(-3) in undoped GaN bulk crystals and layers, whereas the Mg-doped samples are free of Ga vacancies. The Ga vacancies are negatively charged and their concentration correlates with the intensity of the yellow luminescence. We conclude that the Ga vacancies contribute to the electrical compensation of n-type GaN and their acceptor levels are involved in the yellow luminescence transition.
机译:已经进行了正电子an没实验,以识别GaN块状晶体以及外延层中的自然点缺陷。结果表明,在未掺杂的GaN块状晶体和层中,Ga的空位浓度为10〜(17)-10〜(18)cm〜(-3),而掺Mg的样品中无Ga空位。 Ga空位带负电,其浓度与黄色发光的强度相关。我们得出的结论是,Ga空位有助于n型GaN的电补偿,并且其受体能级参与黄色发光过渡。

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  • 来源
    《Nitride semiconductors》|1997年|757-762|共6页
  • 会议地点 Boston MA(US)
  • 作者单位

    Laboratory of Physics, Helsinki Univ. of Technology, P. O. Box 1100, 02015 HUT, Finland;

    Laboratory of Physics, Helsinki Univ. of Technology, P. O. Box 1100, 02015 HUT, Finland;

    Laboratory of Physics, Helsinki Univ. of Technology, P. O. Box 1100, 02015 HUT, Finland;

    Laboratory of Physics, Helsinki Univ. of Technology, P. O. Box 1100, 02015 HUT, Finland;

    Laboratory of Physics, Helsinki Univ. of Technology, P. O. Box 1100, 02015 HUT, Finland;

    Institute of Physics, Warsaw University Branch, Lipowa 41, 15-424 Bialystok and Soltan Institute of Nuclear Studies, 05-400 Otwock - Swierk, Poland;

    Institute of Experimental Physics, University of Warsaw, 00-681 Warsaw, Poland;

    Institute of Experimental Physics, University of Warsaw, 00-681 Warsaw, Poland;

    Institute of Experimental Physics, University of Warsa;

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