Study of energy transfer processes between the rare earth ions in tri-doped upconversion nanoparticles NaGdF4:Yb-Er-Tm and NaGdF4:Yb-Er-Ho

Daria V. Pominova; Vera Yu. Proydakova; Igor D. Romanishkin; Pavel V. Grachev; Sergei V. Kuznetsov; Anastasia V. Ryabova

doi:10.1117/12.2626223

29 April 2022 Study of energy transfer processes between the rare earth ions in tri-doped upconversion nanoparticles NaGdF₄:Yb-Er-Tm and NaGdF₄:Yb-Er-Ho

Daria V. Pominova, Vera Yu. Proydakova, Igor D. Romanishkin, Pavel V. Grachev, Sergei V. Kuznetsov, Anastasia V. Ryabova

Author Affiliations +

Proceedings Volume 12194, Computational Biophysics and Nanobiophotonics; 1219411 (2022) https://doi.org/10.1117/12.2626223
Event: XXV Annual Conference Saratov Fall Meeting 2021; and IX Symposium on Optics and Biophotonics, 2021, Saratov, Russian Federation

Abstract

Study of energy transfer processes between the rare earth ions in NaGdF₄ nanoparticles tri-doped with rare earth ions Yb³⁺, Er³⁺ and Ho³⁺or Tm³⁺ was carried out. The luminescence spectra in short-wave infrared and visible ranges were investigated. It was shown that Er³⁺ → Ho³⁺ energy transfer leads to Ho³⁺ luminescence increase. Both Er³⁺ and Ho³⁺ luminescence peaks were observed in short-wave infrared range. For Er³⁺ and Tm3+ co-doped nanoparticles it was hard to separate luminescence peaks in SWIR. However, both Er³⁺ and Tm³⁺ luminescence peaks were observed in visible range. We attribute this effects to Tm³⁺ → Er³⁺ energy transfer which occurs due to overlap of Er³⁺ and Tm³⁺ luminescence bands in short-wave infrared range which leads to Tm³⁺ luminescence decrease. This hypothesis was confirmed by study of β-NaGdF₄ tri-doped with Yb³⁺, Er³⁺ and Tm³⁺ luminescence spectra during heating. The intensity of Tm³⁺ luminescence increased during heating due to non-resonant nature of Yb³⁺ →Tm³⁺ energy transfer and the shape of spectra changed.

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Daria V. Pominova, Vera Yu. Proydakova, Igor D. Romanishkin, Pavel V. Grachev, Sergei V. Kuznetsov, and Anastasia V. Ryabova "Study of energy transfer processes between the rare earth ions in tri-doped upconversion nanoparticles NaGdF₄:Yb-Er-Tm and NaGdF₄:Yb-Er-Ho", Proc. SPIE 12194, Computational Biophysics and Nanobiophotonics, 1219411 (29 April 2022); https://doi.org/10.1117/12.2626223

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KEYWORDS

Luminescence

Thulium

Nanoparticles

Short wave infrared radiation

Erbium

Energy transfer

Ions

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