Synthesis and upconversion emission studies of CaYF<sub>5</sub>:Ho<sup>3+</sup>/Yb<sup>3+</sup> phosphor and its applications in optical thermometry, fingerprint detection, and security ink
Kumar Shwetabh, Madan M. Upadhyay, Kaushal Kumar
Abstract
for the synthesized upconversion phosphor. The photothermal conversion efficiency of the prepared sample in ethanol medium was tested. Moreover, the sample was used to develop latent fingerprints on various surfaces and good contrast in recorded images is observed. The invisible ink was prepared using the upconversion phosphor and then written words were recorded in upconversion emission mode.
Topics & Concepts
Photon upconversionPhosphorMaterials scienceAnalytical Chemistry (journal)ExcitationIonPower densityOptoelectronicsOpticsDopingChemistryPower (physics)PhysicsQuantum mechanicsChromatographyOrganic chemistryLuminescence Properties of Advanced MaterialsRadiation Detection and Scintillator TechnologiesTerahertz technology and applications