Sm-SrAl2O4 Nanomaterial: Intensive Orange-red component for white LED, Latent finger Print, and anti-counterfeiting applications

Abstract

Sm3+ (1.0 –11.0 mol %) doped SrAl2O4 nanopowders were synthesized by ultrasonication followed by propellant chemistry technique using Aloe Vera (A.V.) extract as a surfactant/fuel. The prepared sample's average crystallite size of ∼ 30.0–32.0 nm was estimated. The surface morphology of the samples showed better porosity with nanorods networked to obtain superstructures. Diffused reflection spectral analysis showed that the prepared samples have an optical energy band gap of 5.22 to 5.6 eV, where the increased concentration of Sm3+ decreased the Eg value of the SrAl2O4: Sm3+ (1.0 – 11.0 mol%). Samples showed intense orange-red emission upon excited with 372 nm. Thereafter CIE and CCT values explain that the prepared nanophosphors (NPs) are highly advantageous for the production of red or excited with 372 nm orange emitting diodes in optoelectronics for display devices and WLED applications. SrAl2O4: Sm3+ (5.0 mol %) NPs were considered to study the LFPs. Hence, the synthesized NPs will give an efficient outlook to visualize ridge patterns in LFPs investigations and anti-counterfeiting applications, which were studied by considering different material surfaces.