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Investigation of luminescence properties of hydrothermally synthesized Pr3+ doped BaLuF5 nanoparticles under excitation by VUV photons

Maji, Sanu Bifal ; Vanetsev, Alexander ; Mändar, Hugo ; Nagirnyi, Vitali ; Chernenko, Kirill LU and Kirm, Marco (2024) In Optical Materials 154.
Abstract

We report on the luminescence properties of hydrothermally synthesized BaLuF5:Pr3+(1%) nanoparticles having a cubic crystal structure. The properties were investigated at low temperatures using time-integrated and time-resolved luminescence spectroscopy under VUV photon excitation in the energy range of 5–45 eV. This spectral region covers both the Pr3+ 4f2→4f15d1 transitions and the intrinsic absorption of the host material. Due to the weak crystal field, only the intra-configurational Pr3+ 4f2→4f2 transitions were observed, resulting in photon cascade emissions. According to structural and morphological studies, the nanoparticles, with... (More)

We report on the luminescence properties of hydrothermally synthesized BaLuF5:Pr3+(1%) nanoparticles having a cubic crystal structure. The properties were investigated at low temperatures using time-integrated and time-resolved luminescence spectroscopy under VUV photon excitation in the energy range of 5–45 eV. This spectral region covers both the Pr3+ 4f2→4f15d1 transitions and the intrinsic absorption of the host material. Due to the weak crystal field, only the intra-configurational Pr3+ 4f2→4f2 transitions were observed, resulting in photon cascade emissions. According to structural and morphological studies, the nanoparticles, with an average size of 21 ± 4 nm, were found to possess large amounts of defects, which are further confirmed through luminescence spectroscopy. The influence of non-radiative decay at the surface and energy transfer to the defects are responsible for the shortening of luminescence decay detected for the 1S0 transitions of Pr3+ ions and intrinsic UV cross-luminescence of host materials. We have discussed the specific energy transfer processes that populate various luminescence centers and evaluated BaLuF5:Pr3+(1%) nanoparticles for potential optical applications.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cross-luminescence, Nanoparticle, Pr 4f S→4f transitions, Self-trapped exciton emission, Time-resolved VUV spectra, UV-C radiation
in
Optical Materials
volume
154
article number
115781
publisher
Elsevier
external identifiers
  • scopus:85198305197
ISSN
0925-3467
DOI
10.1016/j.optmat.2024.115781
language
English
LU publication?
yes
id
aa9e2af6-4c82-461a-94e6-b32841f13a3c
date added to LUP
2024-09-13 14:48:35
date last changed
2025-04-04 13:52:45
@article{aa9e2af6-4c82-461a-94e6-b32841f13a3c,
  abstract     = {{<p>We report on the luminescence properties of hydrothermally synthesized BaLuF<sub>5</sub>:Pr<sup>3+</sup>(1%) nanoparticles having a cubic crystal structure. The properties were investigated at low temperatures using time-integrated and time-resolved luminescence spectroscopy under VUV photon excitation in the energy range of 5–45 eV. This spectral region covers both the Pr<sup>3+</sup> 4f<sup>2</sup>→4f<sup>1</sup>5d<sup>1</sup> transitions and the intrinsic absorption of the host material. Due to the weak crystal field, only the intra-configurational Pr<sup>3+</sup> 4f<sup>2</sup>→4f<sup>2</sup> transitions were observed, resulting in photon cascade emissions. According to structural and morphological studies, the nanoparticles, with an average size of 21 ± 4 nm, were found to possess large amounts of defects, which are further confirmed through luminescence spectroscopy. The influence of non-radiative decay at the surface and energy transfer to the defects are responsible for the shortening of luminescence decay detected for the <sup>1</sup>S<sub>0</sub> transitions of Pr<sup>3+</sup> ions and intrinsic UV cross-luminescence of host materials. We have discussed the specific energy transfer processes that populate various luminescence centers and evaluated BaLuF<sub>5</sub>:Pr<sup>3+</sup>(1%) nanoparticles for potential optical applications.</p>}},
  author       = {{Maji, Sanu Bifal and Vanetsev, Alexander and Mändar, Hugo and Nagirnyi, Vitali and Chernenko, Kirill and Kirm, Marco}},
  issn         = {{0925-3467}},
  keywords     = {{Cross-luminescence; Nanoparticle; Pr 4f S→4f transitions; Self-trapped exciton emission; Time-resolved VUV spectra; UV-C radiation}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Optical Materials}},
  title        = {{Investigation of luminescence properties of hydrothermally synthesized Pr<sup>3+</sup> doped BaLuF<sub>5</sub> nanoparticles under excitation by VUV photons}},
  url          = {{http://dx.doi.org/10.1016/j.optmat.2024.115781}},
  doi          = {{10.1016/j.optmat.2024.115781}},
  volume       = {{154}},
  year         = {{2024}},
}