Abstract
Materials having deep blue emission characteristics with a CIEy chromaticity value less than 0.1 are highly desired. Here we incorporated Pr3+ into the Sr2+ site of the Sr1-x PrxTiO3 (x=0.05, 0.075, 0.10, 0.125, 0.15, 0.20) to quench the typical red photoluminescence (PL) emission in Pr-doped compounds and tune it to a blue-emitting system. XRD analysis and structural refinement demonstrate transition from cubic to tetragonal symmetry at Pr concentrations of, x≥0.1. The contribution of oxygen vacancies in emission mechanism was investigated through XPS analysis. High-resolution FE-SEM analysis of morphological features revealed the creation of tiny grains with the appearance of micro pebbles. Under 380nm UV illumination a narrow-band blue emission peak FWHM of 19.3nm was obtained at 428nm for x=0.05. CIE plots were used to examine the quality of emission peaks and samples show CIEy less than 0.1. This blue emission is crucial for lighting and display applications.
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