首页> 外文期刊>Journal of Materials Science. Materials in Electronics >The properties of AlGaN films and AlGaN/GaN heterostructures grown on (1120) sapphire substrates
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The properties of AlGaN films and AlGaN/GaN heterostructures grown on (1120) sapphire substrates

机译:在(1120)蓝宝石衬底上生长的AlGaN膜和AlGaN / GaN异质结构的特性

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摘要

Al_(x)Ga_(1-x)N films and Al_(x)Ga_(1-x)N/GaN heterostructures were prepared on the (1120) sapphire substrates at elevated temperatures by alternate supply of trimethylgallium (TMG)/trimethylaluminum (TMA) and ammonia (NH_(3)) in an inductively heated quartz reactor. X-ray studies reveal the monocrystalline nature of these Al-containing structures. The results of absorption measurements of the Al_(x)Ga_(1-x)N films exhibit clear cut-off energies of the films. Based on the investigations of transmission electron microscopy (TEM), Al_(x)Ga_(1-x)N films and Al_(x)Ga_(1-x)N/GaN structures were found to deposit on the (1120) sapphire substrates with <0001>_(AlGaN) and <1100>_(AlGaN) being parallel to <1120>_(sapphire) and <1100>_(sapphire), respectively.
机译:通过交替供应三甲基镓(TMG)/三甲基铝(1120)来在高温下在(1120)蓝宝石衬底上制备Al_(x)Ga_(1-x)N膜和Al_(x)Ga_(1-x)N / GaN异质结构( TMA)和氨水(NH_(3))在感应加热的石英反应器中。 X射线研究表明这些含Al结构的单晶性质。 Al_(x)Ga_(1-x)N薄膜的吸收测量结果显示出清晰的薄膜截止能量。基于透射电子显微镜(TEM)的研究,发现Al_(x)Ga_(1-x)N膜和Al_(x)Ga_(1-x)N / GaN结构沉积在(1120)蓝宝石衬底上其中<0001> _(AlGaN)和<1100> _(AlGaN)分别平行于<1120> _(蓝宝石)和<1100> _(蓝宝石)。

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