Abstract
Rare Earth Upconversion nanoparticles (UCNPs) are a type of material that emits high-energy photons by absorbing two or more low-energy photons caused by the anti-stokes process. It can emit ultraviolet (UV) visible light or near-infrared (NIR) luminescence upon NIR light excitation. Due to its excellent physical and chemical properties, including exceptional optical stability, narrow emission band, enormous Anti-Stokes spectral shift, high light penetration in biological tissues, long luminescent lifetime, and a high signal-to-noise ratio, it shows a prodigious application potential for bio-imaging and photodynamic therapy. This paper will briefly introduce the physical mechanism of upconversion luminescence (UCL) and focus on their research progress and achievements in bio-imaging, bio-detection, and photodynamic therapy.
Original language | English |
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Article number | 2474 |
Journal | Nanomaterials |
Volume | 11 |
Issue number | 10 |
DOIs | |
Publication status | Published - Oct 2021 |
Externally published | Yes |
Keywords
- Bio-detection
- Bio-imaging
- PDT
- RE-doped
- UCL
- UCNPs