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Erschienen in:
13.10.2016
Structure and luminescent properties of Ca3Bi(PO4)3:Sm3+ orange phosphor
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 3/2017
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Abstract
A series of orange-emitting Ca3Bi1−x
(PO4)3:xSm3+ phosphors were synthesized by a solid state reaction, the crystal structure and luminescent properties of the materials were studied. The doping of Sm3+ has no obvious influence on the crystal structure of the Ca3Bi(PO4)3 powders and all the samples possess a cubic symmetry. Under the 401 nm excitation, the sample exhibits three typical emission bands located at 561, 598, and 644 nm corresponding to 4G5/2 → 6H5/2, 6H7/2, and 6H9/2 transitions, respectively. For x = 0.03, the sample exhibits an optimum luminescence. The type of energy transfer between Sm3+ is considered as dipole–dipole interaction according to Dexter’s theory. The CIE chromaticity coordinates indicate that the emission of Ca3Bi0.97(PO4)3:0.03Sm3+ locates in orange region. The results indicate that the phosphor may be used as an orange phosphor for NUV-based white LEDs.