Engineered ultra-luminous La/YPO4:Eu3+ nanophosphors for advanced security ink and latent fingerprint (LFPs) detection
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Date
2024
Authors
Journal Title
Journal of Alloys and Compounds
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
Designing versatile NPs for multifarious applications is crucial for achieving an array of criterion in realm, including improving efficiency, inexpensiveness, flexibility, least power consumption, etc. Facile hydrothermal treatment of La/YPO4:Eu3+ NPs yields composite phase growth signifying even-sized NPs with the requisite elemental composition. Relative CTB predominates in LaPO4:Eu3+; while luminescence of YPO4:Eu3+ is notably higher when stimulated by atomic lines. Nevertheless, La/YPO4:Eu3+ NPs exhibit adequate luminescence under both CTB and 394 nm (7F0?5L6) excitations, evincing intrinsic QY (63.91 %) with relatively large lifetime (?6 ms) of 5D0 states, substantiated by J-O analysis. Designed NPs is readily cling to friction ridge skin residues demonstrating the efficient LFPs development through the �powder dusting approach� on various substrate. NPs conjugated PVC gold medium and aqueous PVA were effectively used for security encryptions using the screen-printing technique. Reddish-orange emission with different excitation probabilities resulting in high QY emphasizes them in a class of futuristic versatile materials with potential applications in security ink, LFP development, LEDs, and display devices. � 2024 Elsevier B.V.
Description
Keywords
Brightness, Lanthanide, LFPs, NPs, Photoluminescence (PL), Quantum Yield (QY), Security Inks