Luminescence study of Eu super(3+)doped Li sub(6)Y(BO sub(3)) sub(3 ) phosphor for solid-state lighting

In this study, Li sub(6)Y sub(1-x)Eu sub(x)(BO sub(3)) sub(3) phosphor was successfully synthesized using a modified solid-state diffusion method. The Eu super(3+) ion concentration was varied at 0.05, 0.1, 0.2, 0.5 and 1mol%. The phosphor was characterized for phase purity, morphology, luminescent properties and molecular transmission at room temperature. The XRD pattern suggests a result closely matching the standard JCPDS file (#80-0843). The emission and excitation spectra were followed to discover the luminescence traits. The excitation spectra indicate that the current phosphor can be efficiently excited at 395nm and at 466nm (blue light) to give emission at 595 and 614nm due to the super(5)D sub(0) arrow right super(7)F sub(j) transition of Eu super(3+) ions. Concentration quenching was observed at 0.5mol% Eu super(3+) in the Li sub(6)Y sub(1-x)Eu sub(x)(BO sub(3)) sub(3) host lattice. Strong red emission with CIE chromaticity coordinates of phosphor is x=0.63 and y=0.36 achieved with dominant red emission at 614nm the super(5)D sub(0) arrow right super(7)F sub(2) electric dipole transition of Eu super(3+) ions. The novel Li sub(6)Y sub(1-x)Eu sub(x)(BO sub(3)) sub(3) phosphor may be a suitable red-emitting component for solid-state lighting using double-excited wavelengths, i.e. near-UV at 395nm and blue light at 466nm.