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(Color online) Schematic -type sample structure grown on the (0001) plane of sapphire substrate.
(Color online) Room-temperature photoluminescence spectra of undoped and heavily doped samples.
(Color online) Peak intensity ratio between the UV and parasitic blue emissions, , as a function of silane flow rate.
(Color online) Band diagram of -type illustrating near-band-edge UV emission and parasitic blue emission coming from a deep-level transition.
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