Realization of orange-red emitting double perovskite structured Sm³⁺-doped Ba₂ZnWO₆ nanophosphors: A systematic study of structural, photoluminescence and photometric properties for solid-state lighting applications

Exploring luminescent materials that meet the necessary specifications which can beneficial for solid-state lighting applications has prompted extensive research. In this context, the present article deals with a successful exploration of orange-red emanating double perovskite structured Sm3+ (1-11 mol %) -doped Ba2ZnWO6 nanophosphors synthesized via a self-igniting solution combustion route. The crystallographic studies of the phosphors confirm the cubic phase having Fm(-)3m space group. The morphological investigations exhibit non-uniform flaky-type particles with agglomeration. The average optical energy gap of the phosphors is found to be around 3.25 eV. The photoluminescence emission spectra enclosed three distinctive peaks located at around 564, 597, and 644 nm, which are attributed to (4)G(5/2)-> H-6(J) (J = 5/2, 7/2 and 9/2) transitions of Sm3+ ions, respectively. The estimated chroma coordinates (0.5385, 0.4527) are located in the orange-red region of the chromaticity diagram and achieve correlated color temperature values between 1865 and 2783 K with color purity in the range 94.7-98.7 %. The obtained results dominantly certified the suitability of the prepared nanophosphors as a favorable candidate for solid-state lighting applications.