Abstract
A series of red phosphors Ca 10Li(PO 4) 7:Eu 3+ were synthesized by high temperature solid-state reaction method. Their luminescence properties were characterized by means of photoluminescence excitation and emission spectra, CIE chromaticity and quantum efficiency. Results indicated that the phosphors could be effectively excited by the near ultraviolet (NUV) light (393 nm). The main emission peaks of the phosphor were ascribed to the transition 5D 0- 7F 2 (613 and 617 nm) of Eu 3+ ion when samples were excited by 393 nm. The CIE chromaticity ( x, y) of Ca 9.9Li (PO 4) 7:0.10Eu 3+ was x=0.638, y=0.361 and the quantum efficiency of this phosphor was 75% excited by 393 nm. Therefore, this phosphor could be a promising red component for the applications in white LEDs.
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