A new perovskite type Ba2YZrO6: Eu3+ red phosphor with cubical morphology for WLEDs applications

Abstract

Phosphor converted white light-emitting diodes (pc-WLEDs) have extensively played, a significant role in modern display and lighting fields. In this regard, a new Eu3+ doped Ba2YZrO6 phosphor was synthesized and characterized by XRD, SEM and PL analyses. The prepared phosphor has a perovskite cubic structure with well-dispersed homogeneous cubic morphology. It exhibits intense red emission around 612 nm when excited efficiently by near UV / blue light. The optimum concentration of Eu3+ doped Ba2YZrO6 was determined and the concentration quenching mechanism was examined using the Ozawa's and Dexter's theories. Judd-Ofelt parameters were calculated to enable a study of the nature of site symmetry. The Commission International del’ Eclairagethe (CIE) chromaticity coordinates calculated is (0.5894, 0.4031) for Ba2YZrO6:Eu3+ (5 mol %) phosphor. The phosphor has high colour purity (97.9%) and good thermal stability (67%). The Ba2YZrO6:Eu3+ (5mol %) phosphor would be a promising red-emitting phosphor in Pc-WLEDs.