Enhanced photoluminescence of Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} phosphors by Li{sup +} doping

Journal Article · Thu Nov 15 00:00:00 EST 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.08.028· OSTI ID:21043726

Yu, C C ^[1]; Liu, X M ^[1]; Yu, M ^[1]; Lin, C K; Li, C X; Wang, H ^[1]

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1. State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)

The Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} and Li{sup +}-doped Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} phosphors were prepared by solid-state reaction process. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and photoluminescence (PL) as well as lifetimes, was utilized to characterize the resulting phosphors. Under the excitation of ultraviolet light, the Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} and Li{sup +}-doped Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} show the characteristic emissions of Eu{sup 3+} ({sup 5}D{sub 0}-{sup 7}F{sub 1,2,3} transitions dominated by {sup 5}D{sub 0}-{sup 7}F{sub 1} at 593 nm) and Dy{sup 3+} ({sup 4}F{sub 9/2}-{sup 6}H{sub 15/2},{sub 13/2} transitions dominated by {sup 4}F{sub 9/2}-{sup 6}H{sub 15/2} at 494 nm), respectively. The incorporation of Li{sup +} ions into the Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} phosphors has enhanced the PL intensities depending on the doping concentration of Li{sup +}, and the highest emission was obtained in Ba{sub 2}Gd{sub 0.9}NbO{sub 6}: 0.10Eu{sup 3+}, 0.01Li{sup +} and Ba{sub 2}Gd{sub 0.95}NbO{sub 6}: 0.05Dy{sup 3+}, 0.07Li{sup +}, respectively. An energy level diagram was proposed to explain the luminescence process in the phosphors. - Graphical abstract: The Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} and Li{sup +}-doped Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} phosphors were prepared by solid-state reaction. The incorporation of Li{sup +} ions into the Ba{sub 2}GdNbO{sub 6}: Eu{sup 3+}/Dy{sup 3+} phosphors has enhanced the photoluminescence intensities of Eu{sup 3+} and Dy{sup 3+}, depending on the doping concentration of Li{sup +}.

• OSTI ID: 21043726
• Journal Information: Journal of Solid State Chemistry, Vol. 180, Issue 11; Other Information: DOI: 10.1016/j.jssc.2007.08.028; PII: S0022-4596(07)00372-6; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BARIUM COMPOUNDS
DIAGRAMS
DOPED MATERIALS
DYSPROSIUM COMPOUNDS
DYSPROSIUM IONS
ENERGY LEVELS
EUROPIUM COMPOUNDS
EUROPIUM IONS
EXCITATION
FIELD EMISSION
GADOLINIUM COMPOUNDS
LITHIUM IONS
NIOBATES
PHOSPHORS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
VISIBLE RADIATION