Eu3+ and Dy3+-activated LaAlO3 phosphor for solid-state lighting

Abstract

Rare earth Eu3+ and Dy3+-activated LaAlO3 phosphor were prepared by wet chemical method. The prepared phosphors were characterized by, X-ray diffraction(XRD) for phase purity, scanning electron microscopy (SEM) for morphology and photoluminescence (PL) emission and excitation spectra. SEM analysis does not reveal the crystal structure; however, it shows that the prepared phosphor has irregular morphology with particle size in micron range. Under both 395 nm and 466 nm excitation, LaAlO3:Eu3+ phosphor shows emission at 593 nm and 614 nm. LaAlO3:Dy3+ phosphor shows emission at 484 nm and 575 nm when excited by wavelength of 351 nm. The synthesized phosphors have mercury-free excitation, and therefore, prepared phosphor might be applicable in environmental-friendly solid-state lighting.