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Lanthanide-Codoped Heterojunctions Enable Downconversion Mechanoluminescence
- Mechanoluminescence (ML) is a phenomenon generating light through mechanical stimuli, offering energy-efficient light emission technologies.
- Previous mechanoluminescent materials faced limitations in light intensity and brightness, hindering practical applications.
- A study by Dengfeng Peng and Tianlong Liang introduces a CaF₂/CaZnOS heterojunction with lanthanide codoping to enhance mechanoluminescent output.
- The heterojunction stabilizes the composite and modulates energy pathways for efficient light emission.
- Incorporating terbium and ytterbium ions shows increased mechanoluminescent intensities and efficient energy transfer mechanisms.
- Energy transfer from Tb³⁺ to Yb³⁺ enhances near-infrared emissions, surpassing unity quantum yields.
- Codoping with Pr³⁺-Yb³⁺ pair further enhances energy transfer and quantum efficiency in the heterojunction.
- Lanthanide codoped heterojunctions offer tunable emission wavelengths and intensities, vital for smart sensing and optical communication systems.
- Developing next-generation ML materials through heterojunction strategies promises enhanced operational capabilities and versatile applications.
- The CaF₂/CaZnOS heterojunction system presents a transformative achievement in ML research, emphasizing heterostructured systems for superior performance.
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