首页|Self-calibrated ratiometric thermometers and multi-mode anti-counterfeiting based on Ca2LaNbO6:Pr3+ optical material
Self-calibrated ratiometric thermometers and multi-mode anti-counterfeiting based on Ca2LaNbO6:Pr3+ optical material
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NSTL
Elsevier
? 2022Optical materials have been extensively used in thermometers and anti-countering for their non-contact, advantageous rapid, and high precision properties. Herein, a double-perovskite Ca2LaNbO6:Pr3+ color-tunable phosphor was synthesized. The emissions (blue, green, red1, and red2) from Ca2LaNbO6:Pr3+ phosphor have different temperature-dependent properties because of the thermal quenching channel generated by the intervalence charge transfer state between Pr3+ and Nb5+ ions. They can be used to realize four fluorescence intensity ratio models (Green/Blue, Green/Red2, Red1/Blue and Red1/Red2) to measure temperature with high absolute and relative sensitivities. Moreover, using the Ca2LaNbO6:Pr3+ phosphor and the carbon dots with green afterglow to create anti-counterfeiting patterns, the multi-mode anti-counterfeiting under different portable lamps (254 nm and 365 nm) was realized. Therefore, the prepared multifunctional phosphor indicated a potential application in both optical temperature sensing and anti-counterfeiting simultaneously.
Choi B.C.、Jeong J.H.、Zhang A.、Park S.H.、Sun Z.、Wang Z.、Jia M.、Fu Z.
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Department of Physics Pukyong National University
State Key Laboratory of Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Yanshan University
Coherent Light and Atomic and Molecular Spectroscopy Laboratory Key Laboratory of physics and Technology for Advanced Batteries College of Physics Jilin University
NSTL
Elsevier
