Effect of Bi2+ ions on the photoluminescence properties of BaTiO3:Dy3+ perovskite phosphors for LEDs application

Abstract

A series of (Ba1-xBi0.01)TiO3 doped with Dy3+ ions of varying concentrations is prepared by single step solid state reaction that promulgates solid state lighting device applications. The cubic phase perovskite structure of the prepared samples is determined by the Powder X-ray diffraction results. The emission spectra show evidence of intensive peaks at 572 nm attributing to the 4F9/2 to 6H15/2 of Dy3+ ions. Dy3+ doped phosphors (Ba1-xBi0.01) TiO3: xDy3+ (x= 0, 0.01, 0.03, 0.05 and 0.07) exhibit yellow emission and the highest intensity of emission demarcates the optimum concentration of Ba1-xBi0.01TiO3:0.05Dy3+. SEM studies to assess the surface morphologies alongside the elemental analyses from Energy dispersion spectroscopy (EDS) extensively for optimal concentration have been ventured. The Commission International De I-Eclairage (CIE) and Correlated Color Temperature (CCT) analyses authenticate the present phosphor genuine for fabricating light emitting diodes.