Synthesis and multi-colour luminescence spectra of RE3+ (RE3+ =Eu3+, Sm3+, Dy3+, Eu3+/Sm3+/Dy3+) doped BiLa2O4 phosphors

Syntheses of BiLa2O4 phosphors is carried out by single doping with Eu3+, Sm3+, Dy3+ and tri-doping with Eu3+/Sm3+/Dy3+ ions using high temperature solid reaction method. Characterization studies such as X-ray diffraction, diffuse reflectance spectra, photoluminescence excitation and emission spectra, decay profile measurements are made, in pursuit of a comprehensive analysis of the synthesized materials. As a result of XRD studies, the BiLa2O4 phosphors are found to have monoclinic structure. The luminescence properties of the of BiLa2O4 phosphors varies with different doping elements. The material is subjected to excitation at a wavelength of 464,462 and 422 nm. Strong emission peaks for Eu3+ ions at 626 nm with transition state (5D0 → 7F3), Sm3+ ions at a wavelength of 651 nm with a transition state (4G5/2 → 6H7/2) and Dy3+ ions at a wavelength of 575 nm with a transition state of (4G5/2 → 6H7/2) are observed. It is evident that the BiLa2O4 phosphors are potential candidates optoelectronic application because of the diverse luminescence properties showed on account of doping with different rare earth elements of Eu3+, Sm3+, Dy3+. The luminescence decay curve and chromaticity coordinates of BiLa2O4 phosphors single and tri-doped with Eu3+, Sm3+, Dy3+ have also been investigated.