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Si AND Mg DOPED GaN LAYERS GROWN BY GAS SOURCE MOLECULAR BEAM EPITAXY USING AMMONIA

机译:利用氨气源分子束表观生长的Si和Mg掺杂GaN层

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摘要

The growth of GaN layers was carried out on c-plane sapphire substrates by molecular beam epitaxy (MBE) using NH_3. Undoped GaN layers were grown at 830℃ with growth rates larger than 1 μm/h. Optical properties are characteristics of high quality GaN material and the linewidth of x-ray diffraction (0002) rocking curve is less than 350 arcsec. N- and p-type doping were achieved by using solid sources of Si and Mg. No post-growth annealing was needed to activate the Mg acceptors. As-grown GaN:Mg layers exhibit hole concentrations of 3×10~(17) cm~(-3) and mobilities of 8 cm~2/Vs at 300 K. Light emitting diodes (LEDs) based on GaN p-n homojunction have been processed. The turn on voltage is 3 V and the forward voltage is 3.7 V at 20 mA. The 300 K electroluminescence (EL) peaks at 390 nm.
机译:GaN层的生长是使用​​NH_3通过分子束外延(MBE)在c面蓝宝石衬底上进行的。非掺杂GaN层在830℃下生长,生长速率大于1μm/ h。光学特性是高质量GaN材料的特征,X射线衍射(0002)摇摆曲线的线宽小于350 arcsec。通过使用固态的Si和Mg来实现N型和p型掺杂。不需要后生长退火来激活镁受体。刚生长的GaN:Mg层在300 K下的空穴浓度为3×10〜(17)cm〜(-3),迁移率为8 cm〜2 / Vs。基于GaN pn同质结的发光二极管(LED)处理。 20 mA时,开启电压为3 V,正向电压为3.7V。 300 K电致发光(EL)在390 nm处出现峰。

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  • 来源
    《Nitride semiconductors》|1997年|211-216|共6页
  • 会议地点 Boston MA(US)
  • 作者单位

    Centre de Recherche sur l'Hetero-Epitaxie et ses Applications, Centre National de la Recherche Scientifique, Rue Bernard Gregory, Sophia Antipolis, 06560 Valbonne, France;

    Centre de Recherche sur l'Hetero-Epitaxie et ses Applications, Centre National de la Recherche Scientifique, Rue Bernard Gregory, Sophia Antipolis, 06560 Valbonne, France;

    Centre de Recherche sur l'Hetero-Epitaxie et ses Applications, Centre National de la Recherche Scientifique, Rue Bernard Gregory, Sophia Antipolis, 06560 Valbonne, France;

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

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