Synthesis and optimization of photoluminescence properties in potential reddish orange emitting niobate phosphor for photonic device applications.

摘要: A series of samarium ions (Sm3+ ) activated barium sodium niobate (Ba2 NaNb5 O15 samples have been successfully synthesized via employing a solid-state reaction technique. Single phase, crystalline tetragonal Ba2 were formed and the crystallite size prepared sample varied with doping Sm3+ ions. The scanning electron microscopy (SEM) images :Sm3+ illustrate that particles possess non-uniform spherical structure some agglomeration. phosphors efficiently excited near-ultraviolet (n-UV) (406 nm) emit strong visible emission peaks in range 550-725 nm. phenomenon concentration quenching was detected after x = 0.10 mol for , which arises due to non-radiative energy transfer through dipole-dipole interaction among activator Colour coordinates (0.586, 0.412) optimized phosphor lies reddish orange region. bi-exponential decay behaviour observed photoluminescence curve an average time milliseconds. temperature dependent intensity confirms Ba2-x :xSm3+ (x = 0.10 mol) exhibits adequate thermal stability having high value activation (ΔE = 0.201 eV). comprehensive study analysis as-prepared suggest intense emitting thermally stable can act as potential luminescent material coated lighting, solar cells other photonic devices.