Red luminescence CaSiO3:Eu3+ eco-friendly nontoxic phosphor derived from biomass for display and latent finger print applications

Red luminescent Eu 3+ activated CaSiO 3 phosphor has been prepared by facile green synthesis hydrothermal route using biomass. Future technologies will be required to synthesize on a massive scale using quick, easy, and affordable ways. The current study deals with the preparation of CaSiO 3 :Eu 3+ using egg shell and rice husk ash. The synthesized powders had a single phased monoclinic structure with space group P1 21/C1. It has been found that addition of Eu 3+ ion dopant causes decrease in the optical energy band gap. The phosphor exhibits the intense peak at 612 nm corresponds to 5 D 0 → 7 F 2 of the Eu 3+ anions upon excitation at 392 nm. The lifetimes ranged from 1.90 to 3.53 ms. With an increase in Eu 3+ concentration, emission was tuned towards the red area of the CIE diagram. In order to detect hidden fingerprints on flat surfaces using the powder dusting approach, the CaSiO 3 :Eu 3+ effectiveness was also evaluated. The nontoxicity of CaSiO 3 :Eu 3+ was validated by carrying out a cell viability test on MG 63 cell lines. These outcomes demonstrated that the luminescent CaSiO 3 :Eu 3+ can be used as potential material for display, security encoding, and latent fingerprint applications.