Combustion Synthesis and Study of Crystallographic and Luminescence Aspects of Double Perovskite Ba2BiYO6:Sm3+ Nanocrystal for Modern Lighting Applications

A Sm3+-activated double perovskite Ba2BiYO6 nanocrystal system exhibiting a strong orange-red luminescence was prepared using an energy-efficient solution combustion synthetic procedure. The crystal structures were found to be cubic and belong to the Fm3m (225) space group with irregular shapes having a mean diameter of 51 nm. The surface aspects were explored via scanning and transmission electron microscopic (SEM and TEM) techniques. After exposure to UV energy (410 nm), the nanocrystals emit a active reddish-orange light at 16447 cm-1, caused by the transition from the 4G5/2→6H7/2 electronic state. The effects of energy transfer were also considered. The highest photoluminescence emission intensity occurs at a concentration of 3.0 mol% Sm3+ ions after which starts declining owing to the formation of d-d interactions of concentration quenching. The colour coordinates, based on the chromaticity chart, fall within the reddish region and the correlated colour temperature (CCT) value was measured at 1715 K for optimal sample Ba2BiY0.97Sm0.03O6. Consequently, these nanocrystals are well-suited for use in white lighting emitting (WLED) manufacturing and designed primarily for the purpose of constructing attractive modern lighting components.