Synthesis and optoelectronic aspects of orange-red light emitting Sm3+ doped vanadate nanomaterials for pc-WLEDs

Trivalent samarium doped Ba2LaV3O11 luminescent nanomaterials with deep orange-red emission have been synthesized for the first time using an energy-efficient approach of solution combustion process. Concentration Quenching trend is noted beyond 3.0 mol% Sm3+ doping thus, Ba2La0.97Sm0.03V3O11 nanomaterial is deemed the optimum composition from the whole series of the developed luminescent nanomaterials. The desired nanophosphors revealed brilliant orange-red emission with the most prominent peak at 608 nm ascribed to (4)G(5/2) -> H-6(7/2) shift of Sm3+ ions upon near ultraviolet (NUV) excitation of 410 nm. Differential scanning calorimetry and thermogravimetric analysis are executed to determine the optimum temperature for sintering. Scanning electron microscopy and transmission electron microscopy techniques are utilized to investigate the characteristic morphological features of the developed luminescent vanadate nanomaterials. The elemental analysis revealed the purity of the developed optimum luminescent nanomaterial via energy dispersive X-ray analysis study. The energy band-gap of the optimum nanophosphor is evaluated to be 3.79 eV by Tauc's plot based on Kubelka-Munk theory. Commission International De I'Eclairage chromaticity coordinates are also determined for the prepared series of luminescent nanomaterials. Thus, solution combustion-derived luminescent vanadate (Ba2LaV3O11:Sm3+) nanomaterials exhibit the promising luminous applications as dazzling orange-red emitter components specifically for pc-WLEDs.