期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 717, 期 -, 页码 156-163出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.05.108
关键词
Double perovskite; SbO6 phosphors; Red emitting; White light emitting diodes; Thermal quenching mechanism
资金
- Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)
- National Natural Science Foundation of China [51402133, 51202111]
Eu3+-doped double perovskite (Ba, Sr) LaMgSbO6 phosphors were synthesized by the traditional solid-state reaction method. Structure evolution was investigated by X-ray diffraction and Rietveld structure refinement. The crystallographic data of powders were given in detail. Also, the photoluminescence properties, including excitation spectra, emission spectra, intensity ratios of I (D-5(0)- F-7(2))/I (D-5(0)-F-7(1)), Commission International de L'Eclairage (CIE) chromaticity coordinates, UV-vis diffuse reflectance spectra, lifetimes, and the thermal quenching properties were thoroughly discussed. With the increase of Sr2+ concentration, the emission intensities increased and the decay times decreased. Band gap was calculated to explain the phenomenon of the increased emission intensity. The phosphors showed temperature-sensitive luminescent properties based on the thermal quenching performance. The configurational coordinate diagram was used to explain the thermal quenching mechanism. (C) 2017 Elsevier B.V. All rights reserved.
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