Ternary type BaY2ZnO5: Eu3+ deep-red phosphor for possible latent fingerprint, security ink and WLED applications

Interpol review of fingermarks and other body impressions (2019 – 2022)

“…Preliminary/Pilot studies – Several compounds were presented as new dusting powders: AIE-active composites or molecules [ [277] , [278] , [279] , [280] , [281] ], algal biomass [ 282 ], anti-perovskite phosphors [ 283 ], azo-dyes [ 284 ], β-cyclodextrin-berberine complexes [ 285 ], benzazole derivatives [ 286 ], bisamide analogues [ 287 ], cadmium-doped silica microspheres [ 288 ], chitosan-tripolyphosphate-lysine conjugates [ 289 ], coumarin–pyridone conjugates [ 290 ], crushed eggshells and clamshells [ 291 ], crushed gambir [ 292 ], curcumin analogues [ 293 ], doped montmorillonite [ 278 , 294 , 295 ], doped starch microspheres [ [296] , [297] , [298] ], europium-dextrose composites [ 299 ], iron oxide/zinc sulphide hybrid [ 300 ], metal-organic frameworks [ 301 ], organic NIR emitters [ 302 , 303 ], perylenetetracarboxylate compounds [ 304 ], phenylthiazoles [ 305 ], phosphor-cellulose hybrids [ 306 ], pyrazoles [ 307 ], pyrene-tagged imidazolium salts [ 308 ], pyridine and pyrimidine derivatives [ 309 , 310 ], rare-earth-doped phosphors [ [311] , [312] , [313] , [314] , [315] , [316] , [317] , [318] , [319] ], reduced graphene oxides [ 320 ], resveratrol powder [ 321 ], rhodamine B-doped diatomaceous earth [ 322 ], Schiff base complexes [ [323] , [324] , [325] ], talcum powder […”

Synthesis of NaYF4:Ho3+/Yb3+ colloidal upconversion phosphor and its application for OCT-based imaging, temperature sensing, fingerprinting and security ink

“…Although some Eu 3+ -doped phosphors have been utilized previously for fingerprint detection and anti-counterfeiting applications but due to low-contrast images they cannot be used rigorously. [45][46][47][48] Also the use of hazardous UV radiation for excitation of these phosphors limits their application, whereas phosphors that use excitation in the NIR region are relatively safe for application. To check the suitability of prepared UCNPs for fingerprint detection, we deposited the fingerprints of a volunteer on various surfaces like a plastic zipper bag, printing paper and a glass slide.…”

Rare-earth and transition metal ion single-/co-doped double-perovskite tantalate phosphors: Validation of suitability for versatile applications

“…In addition, a novel alternative anti-counterfeiting strategy based on the flexible phosphor-converted polydimethylsiloxane light-emitting films with good anti-stress and humidity properties was introduced. Such a strategy was confirmed with many advantages (e.g., simple operation and recyclability) relative to the phosphor-based security inks [31][32][33]. Owing to different thermal quenching (thermal quenching efficiencies at various temperatures) of the CITO:Eu 3+ , CITO:Sm 3+ , CITO:Pr 3+ , and CITO:Mn 4+ phosphors, the Ln 3+ /Mn 4+ co-doped phosphors were prepared for potential temperature-dependent LIR thermometry.…”