Influence of rare earth ions on luminescent properties of self-emitting KCa2Mg2(VO4)3 phosphors for lighting application

Abstract

The influence of rare earth (RE) ions on the photoluminescence (PL) properties of self-emitting KCa2Mg2(VO4)3 phosphors were studied in detail. In this investigation, RE doped and undoped KCa2Mg2(VO4)3 phosphors have been successfully synthesized by solid-state reaction (SSR) method. The phase purity, structural, vibrational and luminescence properties have been investigated by different techniques. KCa2Mg2(VO4)3 phosphor shows self-luminescence properties, it exhibits broad emission in the range of 400–650 nm under 346 nm excitation. Interestingly, with the doping of Dy3+ ions in KCa2Mg2(VO4)3, we have noted that emission intensity increases in the initial stage up to 0.3 mol% concentration of Dy3+ ions, after that concentration quenching observed. In addition, luminescence properties of Eu3+ doped KCa2Mg2(VO4)3 phosphors were also investigated for multiple excitation wavelengths. They shows energy transfer behaviour between VO43– and Eu3+. The Commission Internationale de l′Elcairage (CIE) coordinates of RE doped and undoped KCa2Mg2(VO4)3 phosphors have been calculated using OSRAM SYLVANIA color calculator. Overall investigations and their outcomes, it was clearly proved that prepared phosphors have huge potential for future generation lighting technology.