Abstract
GaN nanocrystalline grains of diameter ∼ 8 nm doped by Eu 3+ ions have been synthesized in the powder technology. The energy transfer between nanocrystalline GaN host and Eu 3+ ions has been investigated by photoluminescence excitation spectroscopy. It has been shown that there are three channels for the excitation of Eu 3+ ions: (i) through quantized states in GaN nanocrystals, (ii) through defect-related states in the GaN, and (iii) directly through the excited states of Eu +3 ions. It has been found that for investigated powder the most efficient is the excitation of Eu +3 ions through quantized states in GaN nanocrystals.
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