Luminescence dynamics and enhancement of the UV and visible emissions of Tm³⁺ in LiYF₄:Yb³⁺,Tm³⁺ upconverting nanoparticles.

ABSTRACT: To maximize the intrinsic luminescence efficiency of the higher energy emissions of Tm³⁺ in LiYF₄:Yb³⁺,Tm³⁺ upconverting nanoparticles, we investigated a specific range of Tm³⁺ dopant concentrations. Reported to be optimized at 25% Yb³⁺, 0.5% Tm³⁺, due to the multitude of Tm³⁺-to-Tm³⁺ interactions, the Tm³⁺ concentration commonly used may not be suitable for strong UV and visible emissions. Thus, we varied the concentration of Tm³⁺ in LiYF₄ nanoparticles between 0.08 and 0.55% to elucidate the effect of moderate changes of the dopant concentration on the UV, visible and NIR emissions. We determined a new optimized concentration of 0.24% Tm³⁺ for max

SUBMITTER: Maurizio SL 

PROVIDER: S-EPMC9417519 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature