Photoluminescence Studies of Rare Earth Doped Apatite Structured Phosphors.

We developed novel phosphors based on Y6Ba4(SiO4)6F2(YBSF) apatite doped with Dy3+. Phosphors with different doping concentrations of Dy3+ were prepared and their morphological, structural and spectral properties were analyzed. XRD pattern confirms the formation of Y6Ba4(SiO4)6F2 apatite structured phosphors with space group P63/m and Debye scherrer formula gives the average crystalline size 33.4 nm. The morphological and topographical studies were done by FESEM and HRTEM analysis. EDX spectra show presence of all initial reactants in the final product. Photoluminescence spectra show two prominent peaks at 487 nm and 573 nm corresponding to magnetic dipole transitions (4F9/2 → 6H15/2) and electric dipole transitions (4F9/2 → 6H13/2) for 350 nm excitation wavelength. The chromaticity coordinate of the prepared phosphors was found to be in the region of near white light which shows that prepared phosphor are potential single phased phosphor for white light emitting diodes.