Journal
MATERIALS LETTERS
Volume 170, Issue -, Pages 196-198Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2016.02.022
Keywords
Luminescence; Single phase phosphor; Powellite; WLED
Funding
- Kerala State Council for Science Technology and Environment (KSCSTE)
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Dy3+ doped CaLa1-xNbMoO8 (x=0.02, 0.025, 0.03, 0.035, 0.05, 0.075) phosphors were synthesized using a high temperature solid state method. Powder XRD results confirm the tetragonal phase and detailed investigations on the photoluminescence properties indicated that Dy3+ doped CaLaNbMoO8 phosphors has a strong absorption in near UV region and two sharp emission peaks in the visible region. The yellow (575 nm) and blue emissions (487 nm) upon UV excitation resulted from the forced electric dipole transition of F-4(9/2) -> H-6(13/2) and the magnetic dipole transition of F-4(9/2) -> H-6(15/2) respectively. The emission colors of all the doped samples are located in the white light region. Therefore, Dy3+ doped CaLaNbMoO8 can serve as a promising candidate for single-phase white-light emitting phosphor under near UV excitation. (C) 2016 Elsevier B.V. All rights reserved.
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