Abstract
A series of Ca4.99(PO4)3F:1%Eu3+, 1%X (X = Li+, Au3+, and Bi3+) nanoparticles
are prepared using hydrothermal method, with an average size of 33-62 nm. We study
the improved photoluminescence properties of Ca4.99(PO4)3F:1%Eu3+ by co-doping with
Li+, Au3+, and Bi3+ ions, respectively, and the enhancement of the emission
intensities of Eu3+ is observed in these samples. The effects of Li+ acting as a
charge compensator, Au3+ as a plasma surface sensitizer, and Bi3+ as an energy
conversion agent are discussed. The results show Ca4.99(PO4)3F:1%Eu3+, 1%X
nanoparticles are a promising candidate as a red component for near-ultraviolet
light-emitting diodes.
© 2014 Chinese Optics Letters
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