Abstract

Well-crystallized pure hexagonal phase YBO3:Eu3+ nanoparticles are prepared by the reverse micelles method. Vac uum ultraviolet photoluminescence (VUVPL) spectroscopy showed size-dependent nonlinear luminescence enhancement with remarkably improved chromaticity (0.62, 0.34), as compared to the commercial bulk YBO3:Eu3+ phosphor (0.56, 0.39). The quenching concentration of Eu3+ doping and the ratio of red (D05F27) to orange (D05F17) emission was found significantly enhanced with the decrease in particle size, making it an ideal VUV phosphor for plasma display panels. The possible explanation for size dependence of the Eu–O charge transfer process via lowering of the structural symmetry is proposed in detail.

© 2010 Optical Society of America

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