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- Title
Dye Sensitization for Ultraviolet Upconversion Enhancement.
- Authors
Wang, Mingkai; Wei, Hanlin; Wang, Shuai; Hu, Chuanyu; Su, Qianqian
- Abstract
Upconversion nanocrystals that converted near-infrared radiation into emission in the ultraviolet spectral region offer many exciting opportunities for drug release, photocatalysis, photodynamic therapy, and solid-state lasing. However, a key challenge is the development of lanthanide-doped nanocrystals with efficient ultraviolet emission, due to low conversion efficiency. Here, we develop a dye-sensitized, heterogeneous core–multishelled lanthanide nanoparticle for ultraviolet upconversion enhancement. We systematically study the main influencing factors on ultraviolet upconversion emission, including dye concentration, excitation wavelength, and dye-sensitizer distance. Interestingly, our experimental results demonstrate a largely promoted multiphoton upconversion. The underlying mechanism and detailed energy transfer pathway are illustrated. These findings offer insights into future developments of highly ultraviolet-emissive nanohybrids and provide more opportunities for applications in photo-catalysis, biomedicine, and environmental science.
- Subjects
PHOTON upconversion; NEAR infrared radiation; ENERGY transfer; PHOTODYNAMIC therapy; ENVIRONMENTAL sciences; DYE-sensitized solar cells
- Publication
Nanomaterials (2079-4991), 2021, Vol 11, Issue 11, p3114
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano11113114