Simple fabrication of novel Sm3+ doped BaGd2ZnO5 nanophosphors for flexible displays, improved data security applications, and solid-state lighting applications

Abstract

In the present work, Urea-assisted combustion synthesis of BaGd2ZnO5:Sm3+ nanophosphors (BGZO:Sm NPs) with orthorhombic symmetry and cool white light luminance. According to the morphological study, the agglomerated particles had non-uniform shapes and crystallite sizes between 30 and 40 nm. The decay lifetime and quantum efficiency are found to be 0.387 ms and 51.4%, respectively. PL emission spectra can gather details about the orange-red emanation from produced NPs since they have a fine peak at 601 nm. Studies on photoluminescence (PL) also demonstrate that exchange-type interrelations are the primary mechanism for the non-radiative relaxing of energy. Finally, outstanding luminous performance is demonstrated by CIE color coordinates (0.5601, 0.3421), color purity (71%), and 1,376 K color-associated temperature (CCT). The multilevel characteristics of the phosphor-attached latent fingerprint (LFP) could be clearly identified in 404 nm light. An optimal observational environment is established by the sharp color contrast between the lines of the valley and ridge. Additionally, the impact of the NP utilized on various substrates for the visualization of LFPs is investigated. The findings demonstrate that the NP is a strong candidate for LFP visualization. Here, a flexible light-emitting material made of polydimethylsiloxane (PDMS) is used as the basis for an anti-counterfeiting (AC) method. Eventually, the ideal sample-convert PDMS flexible films with simple operation and good reusability are created, and their security level is further increased by the collaboration of colorful and distinctive characters.