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|Mi R Y and Liu Y G|
|China University of Geosciences, China|
|Posters & Accepted Abstracts: J Material Sci Eng|
|A novel orange reddish light emitting phosphor KCaBi(PO4)2:Sm3+ for UV excitations has been synthesized by the solid state reaction technique. The powder X-ray diffraction patterns and XPS were utilized to confirm the phase composite and crystal structure. The excitation and emission spectra, decay curves and chromaticity coordinates of the as-prepared phosphors were characterized to investigate the photoluminescence properties for application in white light-emitting diodes. The results revealed that the KCaBi(PO4)2:Sm3+ phosphors can be effectively assimilated with near ultraviolet excitation at 405 nm, and exhibit four emission bands originating from the 4G2 -6HJ(J=5/2, 7/2, 9/2 and 11/2) transitions of Sm3+ ions. The concentration quenching mechanism was verified as dipole-dipole interaction. Additional, KCaBi(PO4)2:0.04Sm3+ has a better thermal stability and the prepared samples have a potential application in w-LEDs.|
Mi R Y is a PhD student studying at the School of Materials Science and Technology, China University of Geosciences Beijing. She has her expertise in design and structural analysis of the novel rare earth doped phosphors, controllable preparation and luminescence properties of phosphate materials applied for the w-LED and solar cells.
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