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Synthesis and optical properties of Dy3+, Li+doped CaMoO4phosphor

Authors
Journal
Journal of Rare Earths
1002-0721
Publisher
Elsevier
Publication Date
Volume
29
Issue
6
Identifiers
DOI: 10.1016/s1002-0721(10)60494-2
Keywords
  • Photoluminescence
  • Camoo4:Dy3+
  • Charge Compensator
  • Solid-State Reaction
  • Rare Earths

Abstract

Abstract A series of CaMoO 4 phosphors doped with trivalent dysprosium ions (Dy 3+) and lithium (Li +) were prepared by solid state method at 750 °C for 3 h. X-ray diffraction (XRD) confirmed the crystal structure and quality of phosphors. Scanning electron microscopy (SEM) indicated that the phosphors presented good crystalline state, and the crystalline grain sizes were about 0.5-3.0 μm. The emission spectra showed that the phosphors had intense emission at 480 ( 4F 9/2→ 6H 15/2), 576 ( 4F 9/2→ 6H 13/2) and 660 nm ( 4F 9/2→ 6H 11/2). Meanwhile, the excited spectra indicated it had intense excitation at 352 ( 6H 15/2→ 6P 7/2), 390 ( 6H 15/2→ 4M 21/2) and 450 nm ( 6H 15/2→ 4I 15/2). As a charge compensator, Li + ions were incorporated into CaMoO 4:Dy 3+ phosphors, which enhanced the PL intensities depending on the doping concentration of Li +. The optimal molar fraction of Dy 3+ ions in Ca 1- x MoO 4: xDy 3+, 0.05Li + was 0.05.

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