Gallium Nitride Powders from Ammonolysis: Influence of Reaction Parameters on Structure and Properties
Gallium Nitride Powders from Ammonolysis: Influence of Reaction Parameters on Structure and Properties
复制标题
氨解氮化镓粉末：反应参数对结构和性能的影响
DOI：
10.1021/cm049094s
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发表时间：
2004
影响因子：
8.6
通讯作者：
U. Mishra
中科院分区：
文献类型：
--
作者：
B. Schwenzer;Jerry G. Hu;R. Seshadri;S. Keller;S. Denbaars;U. Mishra
氮化镓（GaN）是通过氨与三种不同的镓前体反应来制备的：氧化镓、氧化镓和元素镓的混合物以及元素镓。X射线衍射表明，所有三种原料产生高度结晶的纤锌矿GaN颗粒。采用固态1H NMR来确定样品中氢的存在。该技术可以明确区分结构质子和结合到晶体表面的质子。此外，固态71 Ga NMR和能量色散X射线分析显示材料中的显著差异。根据起始材料的不同，GaN产品由多达三种不同的相组成。产物GaN粉末的光学性质可以与NMR数据相关联。通过将由氧化镓制备的不发光GaN转化为GaN，当用325 nm He-Cd激光激发时，在室温下在370 nm附近具有明亮的发射，进一步了解GaN的结构和光学性质的相关性。
Gallium nitride (GaN) has been prepared by the reaction of ammonia with three different gallium precursors: Gallium oxide, a mixture of gallium oxide and elemental gallium, and elemental gallium. X-ray diffraction indicates that all three starting materials yield highly crystalline wurtzite GaN particles. Solid-state 1 H NMR has been employed to ascertain the presence of hydrogen in the samples. The technique allows a clear distinction between structural protons and protons bound to the surface of the crystals. In addition, solid-state 71 Ga NMR and energy-dispersive X-ray analysis display significant differences in the material. Depending on the starting material, the GaN product consists of up to three different phases. The optical properties of the product GaN powders could be correlated to the NMR data. By converting nonluminescing GaN prepared from gallium oxide into GaN, with a bright emission at room temperature around 370 nm when excited by a 325 nm He-Cd laser, further insight was gained on the correlation of structural and optical properties of GaN.