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Size selection of oxidized GaN crystallites and their cathodoluminescence properties

机译:氧化GaN微晶的尺寸选择及其阴极发光性质。

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GaN particles of different sizes were separated by a sedimentation technique. We find that a correlation exists between the cathodoluminescence (CL) spectra of the particles and their average sizes. These results imply that the particles contain a substantial fraction of GaN nanocrystallites (NCs) whose emission is shifted by quantum size effects and whose proportions differ with the overall size of the particle. X-ray photoelectron spectroscopy data combined with ion etching show that the NCs comprising these clusters have a GaN core surrounded by a gallium oxide shell. The results indicate that size-separated GaN particles may be useful CL sources of light for exciting phosphors over a range of UV wavelengths without the need for alloys such as AlGaInN. (C) 2004 American Vacuum Society.
机译:通过沉降技术分离出不同尺寸的GaN颗粒。我们发现颗粒的阴极发光(CL)光谱与其平均尺寸之间存在相关性。这些结果表明,颗粒中包含大量的GaN纳米微晶(NCs),其发射因量子尺寸效应而偏移,并且其比例随颗粒的整体尺寸而变化。 X射线光电子能谱数据结合离子蚀刻显示,包含这些簇的NC具有被氧化镓壳包围的GaN核。结果表明,尺寸分离的GaN粒子可能是有用的CL光源,可用于激发一系列UV波长的磷光体,而无需诸如AlGaInN之类的合金。 (C)2004年美国真空学会。

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