GaN-based LED wafers with nano-folding InGaN/GaN multiple quantum wells(MQWs) are grown on n-GaN nanopillar array templates which are fabricated using self assembled Ni nanodots as etching mask.Photoluminescence(PL) spectra of the wafer show uniform light emission wavelength over the whole area of it.No blue shift of the main peak is observed in the electroluminescence(EL) spectra of the LED devices fabricated with the wafer as the injection current increases from 10 mA to 80 mA.This can be ascribed to the ...
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