Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 224, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.117454
Keywords
BiLaWO6:Eu3+; Phosphor; W-LED; Red-emitting material
Categories
Funding
- National Natural Science Foundation of China [31572038]
- Fundamental Research Funds for the Central Universities [2452019076]
- Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and Applications [2019XGJSKFJJ01]
- Construct Program of the Key Discipline in Hunan Province
- Projects of the Education Department of Hunan Province [18A465]
- Science and Technology Plan Project of Chenzhou City [jsyf2017014]
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Eu3+-doped bismuth lanthanum tungstate BiLaWO6 phosphors were synthesized for the first time by a conventional solid-state reaction at 1273 K. By powder X-ray diffraction (XRD), the crystal structure of the phosphor was verified, which revealed its single-phase structure. Under the 467 nm wavelength excitation, the Eu3+-doped BiLaWO6 phosphor powders showed red emission (617 nm) that was ascribed to the D-5(0) -> (7)F(2 )transitions of Eu3+. The effects of concentration on luminescence properties indicated that the optimal doping concentration was x = 0.50 mol. The thermal stability by the emission intensities at various temperatures was verified, and the activation energy (E-a) was approximately 0.29 eV. The luminescence lifetime was analyzed by the decay curve. The chromaticity coordinates of BiLaWO6:Eu(3+ )were x = 0.650, y = 0.347, which had a high color purity at 99.2%. The phosphors had potential application for white light-emitting diodes. (C) 2019 Elsevier B.V. All rights reserved.
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