Structure-composition-luminescence correlations in Sr{sub 2.5-3x/2}Ba{sub 0.5}Sm{sub x}Al{sub 1-y}In{sub y}O{sub 4}F (0.001{<=}x, y{<=}0.1) oxyfluorides
- Department of Engineering in Energy and Applied Chemistry, Silla University, Busan 617-736 (Korea, Republic of)
Luminescent materials composed of Sr{sub 2.5-3x/2}Ba{sub 0.5}Sm{sub x}Al{sub 1-y}In{sub y}O{sub 4}F (0.001{<=}x, y{<=}0.1) were prepared by the solid-state reaction method. After the replacement of Sr{sup 2+} and Al{sup 3+} ions by Sm{sup 3+} and In{sup 3+} ions in Sr{sub 2.5}Ba{sub 0.5}AlO{sub 4}F host structure, a novel charge-transfer band centered around 304 nm shifted from 240 nm is monitored; moreover, sharp and well-resolved emission peaks in the {sup 4}G{sub 5/2}{yields}{sup 6}H{sub J} transitions of the Sm{sup 3+} activator are observed. The diverse excitation and emission photoluminescence spectra of Sr{sub 2.5-3x/2}Ba{sub 0.5}Sm{sub x}Al{sub 1-y}In{sub y}O{sub 4}-{alpha}F1-{delta} (0.001{<=}x, y{<=}0.1) phosphors originated by the charge-transfer of the host to the Sm{sup 3+} activator, the f-f transitions in the Sm{sup 3+} ions, and the defect-induced self-activation are also introduced. - Graphical abstract: After the replacement of Sr{sup 2+} and Al{sup 3+} ions by Sm{sup 3+} and In{sup 3+} ions in Sr{sub 2.5}Ba{sub 0.5}AlO{sub 4}F host structure, a novel charge-transfer band centered around 304 nm shifted from 240 nm is monitored; moreover, sharp and well-resolved emission peaks in the {sup 4}G{sub 5/2}{yields}{sup 6}H{sub J} transitions of the Sm{sup 3+} activator are observed (Figure, Left). The diverse excitation and emission photoluminescence spectra of Sr{sub 2.5-3x/2}Ba{sub 0.5}Sm{sub x}Al{sub 1-y}In{sub y}O{sub 4}-{alpha}F1-{delta} (0.001{<=}x, y{<=}0.1) phosphors originated by the charge-transfer of the host to the Sm{sup 3+} activator, the f-f transitions in the Sm{sup 3+} ions, and the defect-induced self-activation are also introduced. Highlights: Black-Right-Pointing-Pointer Strong and well-resolved emitting peaks are monitored in Sm{sup 3+}-doped oxyfluoride phosphors. Black-Right-Pointing-Pointer Diverse excitation and emission spectra of the oxyfluoride phosphors originated from Sm{sup 3+} activator and the defect-induced self-activation were clearly monitored. Black-Right-Pointing-Pointer Oxyfluoride phosphors could be quite effective to prepare white-emitting light for (near)-UV LED applications.
- OSTI ID:
- 21612912
- Journal Information:
- Journal of Solid State Chemistry, Vol. 186; Other Information: DOI: 10.1016/j.jssc.2011.12.014; PII: S0022-4596(11)00684-0; Copyright (c) 2011 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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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM IONS
DEFECTS
DOPED MATERIALS
EMISSION SPECTRA
EXCITATION
INDIUM IONS
OXYFLUORIDES
PEAKS
PHOSPHORS
PHOTOLUMINESCENCE
SAMARIUM IONS
SOLIDS
CHARGED PARTICLES
EMISSION
ENERGY-LEVEL TRANSITIONS
FLUORINE COMPOUNDS
HALOGEN COMPOUNDS
IONS
LUMINESCENCE
MATERIALS
OXYGEN COMPOUNDS
OXYHALIDES
PHOTON EMISSION
SPECTRA