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Monodisperse and core-shell-structured SiO2@YBO3:Eu3+ spherical particles: synthesis and characterization
Cuikun Lin1, Deyan Kong, Xiaoming Liu
1Key laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
Inorganic Chemistry
|March 7, 2007
Summary
Core-shell SiO2@Y0.9Eu0.1BO3 phosphor particles were synthesized for luminescence applications. Their optical properties can be tuned by adjusting Yttrium Europium Borate coating layers and silica core size.
Area of Science:
- Materials Science
- Nanotechnology
- Luminescence
Background:
- Phosphor materials are crucial for lighting and display technologies.
- Core-shell nanostructures offer unique properties for advanced material applications.
Purpose of the Study:
- To synthesize and characterize SiO2@Y0.9Eu0.1BO3 core-shell phosphor particles.
- To investigate the influence of coating layers and core size on luminescence properties.
- To evaluate the potential for display and lighting applications.
Main Methods:
- Sol-gel process for depositing Yttrium Europium Borate (Y0.9Eu0.1BO3) on silica (SiO2) nanoparticles.
- Characterization using X-ray diffraction (XRD), FE-SEM, TEM, photoluminescence (PL), and cathodoluminescence (CL).
Main Results:
- Successfully created spherical SiO2@Y0.9Eu0.1BO3 core-shell particles with crystalline YBO3 shells.
- Observed characteristic orange-red emission of Eu3+ under UV, VUV, and electron beam excitation.
- Achieved tunable luminescence properties and quantum yields up to 54% with varying coating layers and core sizes.
Conclusions:
- SiO2@Y0.9Eu0.1BO3 core-shell particles exhibit tunable luminescence, suitable for display and lighting.
- The sol-gel method provides a viable route for fabricating these advanced phosphor materials.
- Further optimization of coating and core size can enhance performance for specific applications.
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