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中国科学院物理研究所 北京凝聚态物理国家实验室 北京,100190
收稿日期:2011-05-02,
修回日期:2011-05-30,
网络出版日期:2011-10-22,
纸质出版日期:2011-10-22
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马紫光, 王文新, 王小丽, 陈耀, 徐培强, 江洋, 贾海强, 陈弘. SiN<sub><em>x</em></sub> 插入层的生长位置对GaN外延薄膜性质的影响[J]. 发光学报, 2011,32(10): 1014-1019
MA Zi-guang, WANG Wen-xin, WANG Xiao-li, CHEN Yao, XU Pei-qiang, JIANG Yang, JIA Hai-qiang, CHEN Hong. The Optical and Electrical Properties of GaN Epitaxial Films with SiN<sub><em>x</em></sub> Interlayers Inserted at Different Position[J]. Chinese Journal of Luminescence, 2011,32(10): 1014-1019
马紫光, 王文新, 王小丽, 陈耀, 徐培强, 江洋, 贾海强, 陈弘. SiN<sub><em>x</em></sub> 插入层的生长位置对GaN外延薄膜性质的影响[J]. 发光学报, 2011,32(10): 1014-1019 DOI:
MA Zi-guang, WANG Wen-xin, WANG Xiao-li, CHEN Yao, XU Pei-qiang, JIANG Yang, JIA Hai-qiang, CHEN Hong. The Optical and Electrical Properties of GaN Epitaxial Films with SiN<sub><em>x</em></sub> Interlayers Inserted at Different Position[J]. Chinese Journal of Luminescence, 2011,32(10): 1014-1019 DOI:
系统研究了纳米量级的多孔SiN
x
插入层生长位置对高质量GaN外延薄膜性质的影响。高分辨X射线衍射测量结果表明:SiN
x
插入层生长在GaN粗糙层上能够得到最好的晶体质量。利用测量结果分别计算出了螺位错和刃位错的密度。此外
GaN薄膜的光学、电学性质分别用Raman散射能谱、低温光致发光能谱和霍尔测量的方法进行了表征。实验发现:SiN
x
插入层的生长位置对GaN薄膜的应变大小基本没有影响;但插入层的位置改变了薄膜中的本征载流子浓度。
GaN films with SiN
x
interlayer were grown on sapphire substrates by metal organic chemical vapor deposition. The effect of nanoporous SiN
x
interlayer growth position on the properties of high-quality GaN epitaxial films was investigated systematically. The high-resolution X-ray diffraction spectra was achieved when a SiN
x
interlayer was adopted and inserted on a rough GaN layer. The screw and edge dislocation densities have been calculated. The optical and electrical properties of the GaN films were characterized by Raman scattering spectra
low temperature photoluminescence spectra and Hall measurements
etc.
The position of the SiN
x
interlayer has no impact on the strain in GaN films
but the residual carrier concentration changes with the position of the interlayer.
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