Luminescence properties of micro Ca3Al2O6:Dy3+ phosphor

This Letter reports the synthesis of Dy3+ ions-doped Ca3Al2O6 phosphor by combustion method. The prepared Ca3Al2O6: Dy3+ phosphors were characterised by X-ray diffraction, CIE colour coordinates, scanning electron microscope and photoluminescence spectroscopy. The characteristic intra-configurational 4f emissions of Dy3+ were observed in the emission spectra. The combination of the 485 nm blue emission corresponding to the F-4(9/2) -> H-6(15/2) transition and the 577 nm yellow emission corresponding to the F-4(9/2) -> H-6(13/2) transition yielded white light emission. The concentration quenching effect for Dy3+ was found at the optimum doping concentration of 0.5 mole%. An average crystallite size is in the micrometer range. The CIE colour co-ordinates of Ca3Al2O6: Dy3+ are suitable as white light-emitting phosphors. The obtained results show that the phosphors have the potential for application in solid state lighting.