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Color-Tunable CsCdCl3 Perovskite for Low-Temperature Anticounterfeiting and Information Storage Applications
Xue Hao1, Ting Wang1,2, Xuanyu Zhu1
1College of Materials and Chemistry & Chemical Engineering, Nuclear Technology Key Laboratory of Earth Science, Chengdu University of Technology, Chengdu 610059, China.
Inorganic Chemistry
|August 14, 2024
Summary
This study introduces novel low-temperature anticounterfeiting methods using cesium cadmium chloride (CsCdCl3) phosphors. These materials exhibit unique luminescence properties for authenticating temperature-sensitive products like vaccines.
Area of Science:
- Materials Science
- Solid State Physics
- Photochemistry
Background:
- Low-temperature anticounterfeiting is vital for preserving the integrity of temperature-sensitive goods, including pharmaceuticals and vaccines.
- Existing methods require robust solutions for real-time monitoring and authentication in cold chains.
Purpose of the Study:
- To develop and investigate a novel low-temperature anticounterfeiting strategy utilizing the distinct luminescence characteristics of metal halide perovskites.
- To explore the photoluminescence (PL), persistent luminescence (PersL), and thermally stimulated luminescence (TSL) behaviors of pure CsCdCl3 and CsCdCl3 doped with Te4+.
Main Methods:
- Synthesis and characterization of pure CsCdCl3 and CsCdCl3:10% Te4+ phosphors.
- Analysis of temperature-dependent PL, PersL, and TSL spectra from 100 K to room temperature.
- Investigation of luminescence mechanisms, including changes in luminous centers and trap distributions.
Main Results:
- Pure CsCdCl3 displayed significant temperature-induced color shifts in PL, PersL, and TSL from blue to yellow/orange due to altered luminous centers.
- CsCdCl3:10% Te4+ exhibited stable orange emission, with Te4+ inhibiting matrix emission and regulating low-temperature trap dynamics and TSL intensity.
- The Te4+-doped material demonstrated tunable trap distributions and luminescence intensity crucial for anticounterfeiting applications.
Conclusions:
- CsCdCl3:10% Te4+ and CsCdCl3 phosphors show significant potential as advanced low-temperature anticounterfeiting technologies.
- These materials are particularly promising for enhancing the safety and monitoring of cold-chain vaccines.
