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High-efficiency upconversion luminescence in UCNPs/CsPbBr3 nanocomposites enhanced by silver nanoparticles
Optics Letters
|March 1, 2024
Summary
This study introduces novel nanocomposites of upconversion nanoparticles and perovskite quantum dots, enhancing light emission efficiency for advanced applications like LED lighting and solar cells.
Area of Science:
- Materials Science
- Nanotechnology
- Photonics
Background:
- Upconversion nanocomposites are promising functional materials.
- Low efficiency of current nanocomposites hinders their applications.
Purpose of the Study:
- To develop a novel nanocomposite system for enhanced upconversion luminescence (UCL).
- To investigate energy transfer mechanisms in UCNPs/PeQDs assemblies.
Main Methods:
- Fabrication of nanocomposites using upconversion nanoparticles (UCNPs), perovskite quantum dots (PeQDs), and silver nanoparticles (NPs).
- Utilizing Förster resonance energy transfer (FRET) and photon reabsorption (PR) for NIR sensitization.
- Characterization of photoluminescence (PL) emission efficiency.
Main Results:
- Successfully assembled UCNPs/PeQDs/Ag NPs nanocomposites.
- Demonstrated NIR-triggered UCL in PeQDs via FRET and PR.
- Significantly enhanced PL emission efficiency in UCNPs/CsPbBr3 nanocomposites due to improved energy transfer and radiative decay rates.
Conclusions:
- The proposed nanocomposite system offers a new strategy to boost UCL properties.
- Enhanced UCL in perovskites opens avenues for LED lighting, solar cells, and biomedicine.
