Journal
INORGANIC CHEMISTRY
Volume 58, Issue 3, Pages 1877-1885Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.8b02597
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Funding
- Research Group of Rare Earth Resource Exploiting and Luminescent Materials [2017KCXTD022]
- National Natural Science Foundation of China [21401165]
- Natural Science Foundation of Guangdong Province [2014A030307040]
- Training Program for Excellent Youth Teachers in Universities of Guangdong Province [YQ2015110]
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The structure, site occupancies, and photoluminescence (PL) properties of Ce3+- or Eu2+-doped Ca9La(PO4)(7) phosphors were investigated in this work. The powder X-ray diffraction (XRD) data and Rietveld refinement results showed that the phosphors are pure phases. The vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) spectra and decay curves confirmed that the Ce3+ and Eu2+ ions in Ca9La(PO4)(7) occupied two crystal sites. Additionally, the tunable color can be obtained by adjusting doping concentration and altering temperature. The fabricated w-LED lamp based on Eu2+-doped Ca9La(PO4)(7) phosphor gave properties with a color rendering index (CRI) of 85.26, CIE chromaticity coordinates of (0.358, 0.307), and color temperature (CCT) of 4329 K.
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