Abstract
Pr3+ doped BaO–ZnO– Li2O–P2O5 (BZLP) glass samples synthesised through melt quenching route were studied. The x-ray diffraction (XRD) confirms the amorphous non-crystalline nature of undoped and doped BZLP glass. Absorption spectra show several bands in ultraviolet, visible and infrared regions. The absorption data was used in Judd-Ofelt (J-O) theory to evaluate various radiative parameters. Three peaks are visible in the photoluminescence (PL) emission spectra with the strongest peak positioned at 604 nm for which stimulated emission cross section and quantum efficiency has been assessed. The CIE color coordinates of the samples lie in the red region. The decay time values for 604 nm emission decreased with increased Pr3+ concentration. The luminescence intensity decreased to 88.12% and 82.61% of maximum value at 423 K and 473 K respectively showing high thermal stability. These BZLP glasses can work as an effective deep red-emitting component for w-LEDs and other photonic applications.
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