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 ⁴F_9/2→⁶H_15/2 transition and the 577 nm yellow emission corresponding to the ⁴F_9/2→⁶H_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.