A new strategy to boost luminescent markers for LFP detection and anti-counterfeiting applications using flux assisted BaLa2ZnO5:Eu3+ phosphor

A red-emitting BaLa2ZnO5:Eu3+ nanophosphors (BLZO:Eu NPs) are successfully prepared via combustion method with the aid of variable fluxes. BLZO:Eu NPs without and with flux materials how they differ in terms of their structure, morphology, PL characteristics were discussed. Effect of these flux-materials on the crystal structure found to be minimal. However, the morphology, PL intensity and photoluminescence (PL) performance are all affected by the inclusion of these flux-materials. When compared to other fluxes, the NH4F flux-material more specifically may clearly increase the emission intensity by 2.5 times. Also it provides the best optimization in terms of quantum yield (QY). By tuning the flux material, the colour of the phosphor changes from orange to pure red. The optimized BLZO:3Eu/NH4F NPs performs better luminous labelling platform for latent fingerprint detection and anti-counterfeiting applications. Overall findings overwhelmingly support the employment of the BLZO:3Eu/NH4F phosphor in photonic devices, dermatoglyphics and data security applications.