A novel orange-red emitting NaCaVO{sub 4}:Sm{sup 3+} phosphor for solid state lighting
- School of Physics, Shri Mata Vaishno Devi University, Katra-182320 J&K (India)
- Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, ZA9300 (South Africa)
The samarium doped NaCaVO{sub 4} phosphor was synthesized by the combustion method. The X-ray powder diffraction (XRD) analysis confirmed that the phosphor powder crystallized as orthorhombic structure belonging to space group Cmcm. From Williamson-Hall analysis the grain size and microstrain in the powder was estimated. The Fourier- transform infrared (FT-IR) studies further validated the formation of vanadate phase of the phosphor. Photoluminescence (PL) study revealed that the phosphor could be efficiently excited by UV-VIS from 200 nm to 500 nm. The 565 nm, 602 nm, 648 nm and 713 nm emissions were ascribed to {sup 4}G{sub 5/2} to {sup 6}H{sub J} (J = 5/2, 7/2, 9/2 and 11/2) transitions of the Sm{sup 3+} ion. The present material may be explored as a novel phosphor to be excited by UV light emitting diodes (LEDs) chips for solid-state lighting and display applications.
- OSTI ID:
- 22606590
- Journal Information:
- AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCIUM COMPOUNDS
DOPED MATERIALS
FOURIER TRANSFORMATION
GRAIN SIZE
INFRARED SPECTRA
LIGHT EMITTING DIODES
ORTHORHOMBIC LATTICES
PHOSPHORS
PHOTOLUMINESCENCE
POWDERS
SAMARIUM ADDITIONS
SODIUM COMPOUNDS
SOLIDS
SPACE GROUPS
ULTRAVIOLET RADIATION
VANADATES
X-RAY DIFFRACTION