Abstract：The nanocrystalline of Y2O3:Eu3+ red phosphor has been studied. The result shows that the maximum excitation spectrum of Y2O3:Eu3+ peaks at λex=252.6 nm, while the maximum emission spectrum peaks at λem=613.4 nm under 254 nm excitation. The luminescence intensity increases with the growth of agglomerate size, adding assistant melting agent and increasing the sintering temperature. The hanging-bonds and the defects on the surface of nanocrystalline Y2O3:Eu3+ particle were removed and its luminescence intensity was increased by the coating process.
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