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APPLIED PHYSICS LETTERS
Volume 90, Issue 18, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2735928
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The authors report gallium nitride (GaN) nanoscale light emitting diodes utilizing n-GaN nanowire/p-GaN substrate homojunctions. Utilizing electric field assisted alignment, n-type gallium nitride nanowires were placed on the surface of a p-doped GaN thin film. Electroluminescence with 365 nm peak wavelength and 25 nm full width half maximum was observed from these p-n junctions. These nanowire/epilayer p-n junction diodes were passivated with a thin layer of SiO2 and did not exhibit any parasitic emission related to the bulk or surface defects. The present fabrication scheme, utilizing only batch fabrication techniques, yields reliable, electrically injected nanoscale ultraviolet light sources. (c) 2007 American Institute of Physics.
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