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Erschienen in:
11.03.2019
Photoluminescence properties of dysprosium doped novel apatite-type Ba2Y3(SiO4)3F white-emitting phosphor
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 8/2019
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Abstract
A series of novel single-phased apatite-type white-light-emitting Ba2Y3(SiO4)3F: xDy3+ (x = 0.005, 0.007, 0.01, 0.02, 0.03, 0.05, and 0.08) phosphors were prepared via a facile solid-state reaction. X-ray diffraction patterns of these phosphors revealed that all the samples have a single-phase fluorosilicate apatite with hexagonal structure. The Ba2Y3(SiO4)3F:Dy3+ phosphor can absorb in the UV–vis spectral region of 300–480 nm and presented a white light emission, including three peaks at 478, 573, and 663 nm, attributed to the 4F9/2 → 6H15/24F9/2 → 6H13/2, and 4F9/2 → 6H11/2 transitions of Dy3+ ions, respectively. The optimized doping concentration of Ba2Y3(SiO4)3F: xDy3+ ions was 2%. The Ba2Y3(SiO4)3F: 0.02Dy3+ with excellent thermal stability could maintain the emission intensity about 87% at 150 °C of that at room temperature. The chromatic properties of Ba2Y3(SiO4)3F: xDy3+ were been found into the white light region. The experimental results reveal that the synthesized phosphor has potential applications in white LEDs.