Journal
APPLIED SCIENCES-BASEL
Volume 12, Issue 15, Pages -Publisher
MDPI
DOI: 10.3390/app12157883
Keywords
CaMoO4; microwave-assisted synthesis; X-ray diffraction; photoluminescence
Categories
Funding
- Ministry of Science and Technology
- MOST [108-2637-E-236-001, 109-2637-E-236-001]
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In this study, a series of Sm3+/Tb3+ co-doped CaMoO4 phosphors were synthesized by an efficient method of microwave-assisted heating. The research focused on the characterization and performance analysis of the synthesized phosphors. The results showed that the light-emitting region of the phosphors can be controlled by adjusting the molar ratio of Sm3+/Tb3+ ions, making them a promising material for color-tunable phosphors in white-LEDs.
We present a series of Sm3+/Tb3+ co-doped CaMoO4 phosphors synthesized by an efficient method of microwave-assisted heating. The prepared CaMoO4 samples were characterized by X-ray diffraction, photoluminescence, and Commission Internationale de l'Elcairage (CIE) chromaticity diagram. The X-ray diffraction results confirmed that all synthesized CaMoO4 samples are crystallized in a pure tetragonal phase. The photoluminescence spectra significantly show both red- and green emissions in the synthesized Sm3+/Tb3+ co-doped CaMoO4 phosphors. It is obvious that the variations in the intensity ratio of red/green emissions depend on the molar ratio of Sm3+/Tb3+ co-doping and dominate the CIE color coordinates on the chromaticity diagram. The investigations showed the functionality of the material system as advanced color-tunable phosphors for white-LEDs as evidenced by the controllability of the light-emitting region of Sm3+/Tb3+ co-doped CaMoO4 phosphors through the adjustment of the molar ratio of Sm3+/Tb3+ ions.
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