RETRACTED ARTICLE: Development of a new-double perovskite type Sr2YZrO5.5:Eu3+ red phosphor for latent fingerprint applications

Latent fingerprint applications are playing a major role in forensic science investigations, in which the hidden impressions are illuminated using phosphors. In the present paper, a new double perovskite Eu3+-doped Sr2YZrO5.5:Eu3+ red phosphor was prepared through a modified solid-state reaction method and characterized by XRD, SEM and PL analysis. From XRD results, the structural phase was confirmed and further, Rietveld refinement clarified the structure. The PL emission spectra of the Sr2YZrO5.5:Eu3+ phosphors give an intense red emission at 612 nm when excited by 275 nm (CTB). The optimum dopant concentration of the Eu3+ ions in the present phosphor was determined. Using Ozawa’s and Dexter’s theories, the concentration quenching mechanism was obtained. The CIE values of Sr2YZrO5.5:Eu3+ (7 mol%) phosphor is found to be (0.6320, 0.3662). It has a high colour purity of 99.6%. The obtained outcomes of the present phosphor can be employed as a capable red component in latent fingerprint detection applications.