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This paper reports the structural and photoluminescence (PL) characteristics of single-layer and multi-stack InN/GaN quantum dots (QDs) with varying spacer thickness. A single crystalline 10-nm thick GaN capping layer is grown on the InN QDs by the flow-rate modulation epitaxy (FME) method. The PL peak is red shifted down to 18meV and its full width at half maximum (FWHM) was narrowed from 104meV...
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