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Untangling the controversy on Ce3+luminescence in LaAlO3crystals

Pejchal, Jan ; Babin, Vladimir ; Buryi, Maksym ; Laguta, Valentyn ; Hájek, František ; Páterek, Juraj ; Procházková-Prouzová, Lenka ; Havlák, Lubomír ; Czerneková, Vladimíra and Vaněček, Vojtěch , et al. (2022) In Materials Advances 3(8). p.3500-3512
Abstract

Aluminum perovskites represent an important group of promising scintillation materials with excellent proportionality and energy resolution, but due to difficulties in crystal growth not much attention has been paid to them. We studied a Ce-doped LaAlO3lanthanum-aluminum perovskite (LaAP) because of its easy crystal growth facilitated by the large La3+cations in the matrix. Moreover, recent observations of intense blue luminescence by some researchers show that the potential of this material could not be ruled out. On the other hand, some reports claim that Ce3+luminescence is completely absent in the LaAP matrix. Therefore, we have decided to study this material in much greater detail using an extended... (More)

Aluminum perovskites represent an important group of promising scintillation materials with excellent proportionality and energy resolution, but due to difficulties in crystal growth not much attention has been paid to them. We studied a Ce-doped LaAlO3lanthanum-aluminum perovskite (LaAP) because of its easy crystal growth facilitated by the large La3+cations in the matrix. Moreover, recent observations of intense blue luminescence by some researchers show that the potential of this material could not be ruled out. On the other hand, some reports claim that Ce3+luminescence is completely absent in the LaAP matrix. Therefore, we have decided to study this material in much greater detail using an extended set of correlated experiments to explain the observed discrepancies and underlying phenomena. Crystal growth by the micro-pulling-down method is reported together with the luminescence and scintillation properties. We demonstrate the influence of inclusions of other aluminate phases created during the crystal growth on the luminescence processes. The existence of the phases was simultaneously confirmed by observations using a scanning electron microscope, cathodoluminescence, energy-dispersive X-ray analysis and electron paramagnetic resonance (EPR), which were correlated with photoluminescence and scintillation studies. The EPR evidenced the incorporation of Ce ions in different environments comprising the LaAP matrix and inclusions. Based on these results, the luminescence mechanism is proposed and discussed and the low scintillation efficiency of the Ce-doped LaAP is explained together with the discrepancies in the literature.

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type
Contribution to journal
publication status
published
subject
in
Materials Advances
volume
3
issue
8
pages
13 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85126996919
ISSN
2633-5409
DOI
10.1039/d1ma01083b
language
English
LU publication?
yes
id
85688815-cf34-43bb-97ce-1feb30cdb2ec
date added to LUP
2022-04-19 15:42:41
date last changed
2022-06-28 08:55:39
@article{85688815-cf34-43bb-97ce-1feb30cdb2ec,
  abstract     = {{<p>Aluminum perovskites represent an important group of promising scintillation materials with excellent proportionality and energy resolution, but due to difficulties in crystal growth not much attention has been paid to them. We studied a Ce-doped LaAlO<sub>3</sub>lanthanum-aluminum perovskite (LaAP) because of its easy crystal growth facilitated by the large La<sup>3+</sup>cations in the matrix. Moreover, recent observations of intense blue luminescence by some researchers show that the potential of this material could not be ruled out. On the other hand, some reports claim that Ce<sup>3+</sup>luminescence is completely absent in the LaAP matrix. Therefore, we have decided to study this material in much greater detail using an extended set of correlated experiments to explain the observed discrepancies and underlying phenomena. Crystal growth by the micro-pulling-down method is reported together with the luminescence and scintillation properties. We demonstrate the influence of inclusions of other aluminate phases created during the crystal growth on the luminescence processes. The existence of the phases was simultaneously confirmed by observations using a scanning electron microscope, cathodoluminescence, energy-dispersive X-ray analysis and electron paramagnetic resonance (EPR), which were correlated with photoluminescence and scintillation studies. The EPR evidenced the incorporation of Ce ions in different environments comprising the LaAP matrix and inclusions. Based on these results, the luminescence mechanism is proposed and discussed and the low scintillation efficiency of the Ce-doped LaAP is explained together with the discrepancies in the literature.</p>}},
  author       = {{Pejchal, Jan and Babin, Vladimir and Buryi, Maksym and Laguta, Valentyn and Hájek, František and Páterek, Juraj and Procházková-Prouzová, Lenka and Havlák, Lubomír and Czerneková, Vladimíra and Vaněček, Vojtěch and Doležal, Václav and Havlíček, Jan and Rubešová, Kateřina and Zemenová, Petra and Falvey, Alexandra and Král, Robert and Pankratov, Vladimir and Chernenko, Kirill}},
  issn         = {{2633-5409}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{3500--3512}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Materials Advances}},
  title        = {{Untangling the controversy on Ce<sup>3+</sup>luminescence in LaAlO<sub>3</sub>crystals}},
  url          = {{http://dx.doi.org/10.1039/d1ma01083b}},
  doi          = {{10.1039/d1ma01083b}},
  volume       = {{3}},
  year         = {{2022}},
}