研究目的
Investigating the dual mode luminescent behavior and tunable multicolor upconversion emission of Er doped layered perovskites for security ink applications.
研究成果
The synthesized Er doped BST nanoparticles exhibit dual mode luminescent behavior and tunable multicolor upconversion emission, making them suitable for high-security anti-counterfeiting inks. The ability to control emission color through sensitizer/activator ratio offers a novel approach to security ink design.
研究不足
The study focuses on the synthesis and luminescent properties of Er doped BST nanoparticles, with potential limitations in scalability and practical application in security inks.
1：Experimental Design and Method Selection:
Synthesis of Er3+ doped BST nanoparticles through solid state method. Photoluminescence spectroscopy under UV (366nm) and IR (980nm) excitation.
2：Sample Selection and Data Sources:
Bismuth strontium tantalate (BST) co-doped with various concentrations of Yb/Er.
3：List of Experimental Equipment and Materials:
ZEISS Ultraplus Field Emission Scanning Electron Microscope (FE-SEM), Bruker/D8 Advance with Cu Kα radiation, 980nm NIR laser diode.
4：Experimental Procedures and Operational Workflow:
Mixing stoichiometric amount of reagents, heating at 900°C, 1050°C, and 1200°C for 4 hours each with intermediate grinding.
5：Data Analysis Methods:
Analysis of upconversion emission spectra, CIE chromaticity diagram for color visualization.
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