Spectral engineering of UV luminescence of upconverting nanoparticles

Vina Nguyen; Peter Dawson; Marek Romanowski

doi:10.1117/12.2546826

21 February 2020 Spectral engineering of UV luminescence of upconverting nanoparticles

Vina Nguyen, Peter Dawson, Marek Romanowski

Author Affiliations +

Proceedings Volume 11255, Colloidal Nanoparticles for Biomedical Applications XV; 1125510 (2020) https://doi.org/10.1117/12.2546826
Event: SPIE BiOS, 2020, San Francisco, California, United States

Abstract

Spectral tuning of UV luminescence of upconverting nanoparticles (UNPs) enables development of modern applications of upconversion such as infrared-driven photochemistry. We investigated spectral tuning of luminescence of upconverting nanoparticles composed of NaYF₄: Yb³⁺ , Tm³⁺ (69.5:30:0.5). We demonstrated spectral control of luminescence of these UNPs by adding lanthanide ion that acts as a quenching agent for selected wavelengths of luminescence of Tm³⁺. Erbium (Er³⁺), which contains an energy level closely matching that of the ultra-violet (UV) energy level of Tm³⁺ ( 1D2), was selected as the quenching ion in this study. First, we demonstrated energy transfer between the luminescent ion (Tm³⁺) and the quenching ion (Er ³⁺). Subsequently, we demonstrated tuning of the UV luminescence intensity of these UNPs. The desired spectral output of the UNP is dependent on two factors, the selection of the quenching agent and its doping ratio in UNP composition.

Citation Download Citation

Vina Nguyen, Peter Dawson, and Marek Romanowski "Spectral engineering of UV luminescence of upconverting nanoparticles", Proc. SPIE 11255, Colloidal Nanoparticles for Biomedical Applications XV, 1125510 (21 February 2020); https://doi.org/10.1117/12.2546826

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