Near unity green emission with radiative and non-radiative itemization into novel energy-efficient Sr6Al4Y2O15:Er3+ nanomaterials for WLEDs

• Er 3+ -activated Sr 6 Al 4 Y 2 O 15 nanomaterials had been fabricated via an ecologically sound combustion methodology. • Rietveld refinement technique disclosed their phase-purity and intrinsic crystal framework. • Down-converted photoluminescent traits (radiative as well as non-radiative) had been discussed meticulously. • Luminescence attenuation was predominated via dipole–dipole kind inter-relations. • Potential candidate for cool-WLEDs,...