Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 8, Pages 13709-13713Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.05.007
Keywords
Optical properties; Photoluminescence; Phosphors; Rare earth ions
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Funding
- National Natural Science Foundation of China [41172053, 51202226, 51172216]
- Fundamental Research Funds for the Central Universities [2652013043, 53200959276]
- Science and Technology Innovation Fund of the China University of Geosciences (Beijing)
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A novel blue-emitting phosphor Sr8La2(PO4)(6)O-2:Eu2+ was synthesized via the conventional high-temperature solid-state method and its photoluminescence (PL) properties were investigated for application in white light-emitting diodes. The phosphor exhibited strong broad absorption band in the near ultraviolet (n-UV) range, and generated bright blue emission centered at 442 nm upon 365 nm excitation light. The critical Eu2+ quenching concentration (QC) mechanism was verified to be the dipole dipole interaction. The fluorescence decay curves, temperature dependence photoluminescence and CIE value of Sr8La2(PO4)(6)O-2:Eu2+ phosphors were discussed. The above results indicated that Sr8La2(PO4)(6)O-2:Eu2+ phosphor is a good candidate as a blue component for potential application in UV-excited w-LEDs. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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