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Issue 40, 2020
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On a local (de-)trapping model for highly doped Pr3+ radioluminescent and persistent luminescent nanoparticles

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Abstract

Trivalent praseodymium exhibits a wide range of luminescent phenomena when doped into a variety of different materials. Herein, radioluminescent NaLuF4:20%Pr3+ nanoparticles are studied. Four different samples of this composition were prepared ranging from 400–70 nm in size. Kinetic studies of radioluminescence as a function of X-ray irradiation time revealed a decrease in the emissions originating from the 1S0 level, due to the formation or optical activation of defects during excitation, and a simultaneous increase in the visible emissions resulting from the lower optical levels. Thermoluminescence measurements elucidated that a local de-trapping mechanism was responsible for the increase in steady state emission and persistent luminescence originating from the lower optical levels. The results and mechanism described through this study serve to provide a novel nanoparticle composition with versatile luminescent properties and provides experimental evidence in favor of a local trapping model.

Graphical abstract: On a local (de-)trapping model for highly doped Pr3+ radioluminescent and persistent luminescent nanoparticles

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Supplementary files

Article information


Submitted
11 Sep 2020
Accepted
02 Oct 2020
First published
02 Oct 2020

Nanoscale, 2020,12, 20759-20766
Article type
Paper

On a local (de-)trapping model for highly doped Pr3+ radioluminescent and persistent luminescent nanoparticles

G. A. Mandl, D. Van der Heggen, D. R. Cooper, J. J. Joos, J. Seuntjens, P. F. Smet and J. A. Capobianco, Nanoscale, 2020, 12, 20759
DOI: 10.1039/D0NR06577C

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