Optical investigation of Eu3+ doped bi12geo20 (BGO) crystals

Marcin Kowalczyk , T.F. Ramazanova , V.D. Grigoryeva , V.N. Shlegel , Marcin Piotr Kaczkan , Bartosz Fetliński , Michał Malinowski

Abstract

The spectroscopic properties of Eu3+ doped Bi12GeO20 (BGO) sillenite bulk crystals that were grown by the low-thermal-gradient Czochralski technique (LTG Cz) were investigated. The absorption spectra and the emission properties have been measured at room temperature (300 K) and at 10 K. Luminescence was observed both due to the direct Eu3+ ion excitation, as well as under UV excitation due to the energy transfer between Bi3+ and Eu3+ ions. Bi3+ → Eu3+ energy transfer mechanisms in Eu3+:BGO doped host were investigated. The Ωλ parameters, as well as radiative lifetimes, were calculated based upon the Judd-Ofelt formalism. The branching ratios and electric dipole transition probabilities were also determined, based upon the obtained experimental results. Luminescence has been observed from the5D0,1,2 levels of Eu3+, with emissions from the5D0 level being the strongest. The strongest observed luminescence band corresponds to the5D0 → 7F0 transition at 578.7 nm. Reasons for the strong presence of the theoretically forbidden5D0 → 7F0 emission were investigated.

Author Marcin Kowalczyk (FEIT / MO)
Marcin Kowalczyk,,
- The Institute of Microelectronics and Optoelectronics
, T.F. Ramazanova - [Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences]
T.F. Ramazanova,,
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, V.D. Grigoryeva - [Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences]
V.D. Grigoryeva,,
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, V.N. Shlegel - [Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences]
V.N. Shlegel,,
-
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, Marcin Piotr Kaczkan (FEIT / MO)
Marcin Piotr Kaczkan,,
- The Institute of Microelectronics and Optoelectronics
, Bartosz Fetliński (FEIT / MO)
Bartosz Fetliński,,
- The Institute of Microelectronics and Optoelectronics
, Michał Malinowski (FEIT / MO)
Michał Malinowski,,
- The Institute of Microelectronics and Optoelectronics
Journal seriesCrystals, ISSN 2073-4352
Issue year2020
Vol10
No4
Article number285
ASJC Classification1500 General Chemical Engineering; 1604 Inorganic Chemistry; 2500 General Materials Science; 3104 Condensed Matter Physics
DOIDOI:10.3390/cryst10040285
Languageen angielski
File
crystals-10-00285-v2.pdf 3.71 MB © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 28-09-2020, ArticleFromJournal
Publication indicators Scopus Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.695; WoS Impact Factor: 2018 = 2.061 (2) - 2018=2.086 (5)
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