Optical study of rare earth activated NaBa0.45Sr0.55PO4 phosphor |
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Authors: | KN Shinde SJ Dhoble |
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Institution: | 1. Departmentof Physics, N.S. Science and Arts College, Bhadrawati, Chandrapur 442902, India;2. Department of Physics, RTM Nagpur University, Nagpur, India |
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Abstract: | Dy3+ and Eu2+ activated triple phosphate NaBa0.45Sr0.55PO4 phosphors were prepared by facile combustion synthesis. Excellent emission observed when NaBa0.45Sr0.55PO4:Dy3+ and NaBa0.45Sr0.55PO4:Eu2+ excited at 348 nm and 354 nm wavelength respectively. From a powder X-ray diffraction (XRD) analysis, the formation of compound with a trigonal–hexagonal scalenohedral structure was confirmed. In the photoluminescence spectra, the NaBa0.45Sr0.55PO4:Dy3+ phosphor emits two distinctive colours: a blue band centred at 482 nm and a yellow band at 576 nm originating from Dy3+ whereas NaBa0.45Sr0.55PO4:Eu2+ emits blue colour at 470 nm. Also, surface morphology has been studied by scanning electron microscope (SEM). Phosphors exhibit a strong absorption in the range of 340–400 nm and chromatic properties indicated that present phosphor is a hopeful candidate for near ultra violet light emitting diodes (nUV LEDs). |
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