2004
DOI: 10.1116/1.1775198
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Size selection of oxidized GaN crystallites and their cathodoluminescence properties

Abstract: Photoluminescence from GaN nanopowder: The size effect associated with the surface-to-volume ratio GaN particles of different sizes were separated by a sedimentation technique. We find that a correlation exists between the cathodoluminescence ͑CL͒ spectra of the particles and their average sizes. These results imply that the particles contain a substantial fraction of GaN nanocrystallites ͑NCs͒ whose emission is shifted by quantum size effects and whose proportions differ with the overall size of the particle.… Show more

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Cited by 6 publications
(6 citation statements)
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“…For comparison, the GaN substrate was cleaved to form 0.1~1-μm-diameter pieces, which had random surface orientations including polar and nonpolar axes. Then, the GaN pieces were deposited on the Si substrate by the sedimentation technique [7].…”
Section: Methodsmentioning
confidence: 99%
“…For comparison, the GaN substrate was cleaved to form 0.1~1-μm-diameter pieces, which had random surface orientations including polar and nonpolar axes. Then, the GaN pieces were deposited on the Si substrate by the sedimentation technique [7].…”
Section: Methodsmentioning
confidence: 99%
“…2 The GaN crystallites were boiled in pure water at a temperature of 80°C for 30 min before the reannealing in vacuum for the formation of surface oxide layers, whose thickness was approximately 10 nm. The GaN powder incorporates hydrogen because of its insufficient reaction with Ga and ammonia.…”
Section: Methodsmentioning
confidence: 99%
“…2 Generally, small particles such as GaN crystallites have a large surface, which leads to intentional surface recombination. 1 The light-emission wavelength of nanoscale GaN crystallites can be controlled by selecting their diameters.…”
Section: Introductionmentioning
confidence: 99%
“…Thus, the upper suspension was removed and placed in another vessel. Next, a substrate was introduced into the solution and the GaNO particles deposited until the acetone had completely evaporated [8].…”
Section: Fabrication Of Electroluminescent Devicesmentioning
confidence: 99%