4.6 Article

Intense broad-band absorption and blue-emitting Ca9La (PO4)5(SiO4)Cl2:Eu2+ phosphor under near-ultraviolet excitation

Journal

JOURNAL OF LUMINESCENCE
Volume 206, Issue -, Pages 154-157

Publisher

ELSEVIER
DOI: 10.1016/j.jlumin.2018.10.036

Keywords

Phosphors; Spectrum; Decay; Blue-emitting

Categories

Funding

  1. National Natural Science Foundation of China [51672257]
  2. Fundamental Research Funds for the Central Universities [2652017348, 2652017335]
  3. State Scholarship Fund of China Scholarship Council (CSC)

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A series of novel luminescence phosphors Ca9La(PO4)(5)(SiO4)Cl-2:xEu(2+) (CLPSCl:Eu2+) with apatite structure have been synthesized by a high temperature solid-state reaction. The phased purity of as-prepared phosphors was verified through XRD technique. For further discussion, a series of analysis were performed such as the photoluminescence emission and excitation spectrum and decay lifetime to identify the luminescent properties of CLPSCl:Eu2+ phosphors. The CLPSCl:Eu2+ displays broad excitation spectra ranging from 250 to 450 nm, and intends emission intensity at 461 nm under 345 nm. The optimum Eu2+ concentration of CLPSCl is 8 mol%. The luminescence decay lifetime of the optimum phosphors was measured to be 275 ns. All of the results obtained highly indicate that CLPSCl:Eu2+ is potentially blue-emitting phosphor for application in white LEDs.

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