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Y2O3:Eu nanocrystals in the size range 70–100 nm have been synthesized with a photoluminescence efficiency 10–20 % higher than that of the commercial bulk material. The Figure shows nanocrystalline Y2O3:Eu after firing of the precursor material. It can be seen that the crystals are structurally perfect, i.e., no defects are found within the crystal structure.
Wakefield et al. (Mon,) studied this question.