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Site-selective luminescence of Eu3+ ions in silicate-tungstates with apatite and scheelite structures

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Заглавие Site-selective luminescence of Eu3+ ions in silicate-tungstates with apatite and scheelite structures
 
Автор Pustovarov, V. A.
Vasin, A. A.
Zuev, M. G.
 
Тематика APATITE
ASYMMETRY COEFFICIENT
EU3+ ION
INTRACONFIGURATIONAL F-F TRANSITIONS
PHOTOLUMINESCENCE
SCHEELITE
APATITE
CALCIUM SILICATE
CRYSTAL STRUCTURE
EMISSION SPECTROSCOPY
ENERGY TRANSFER
EUROPIUM COMPOUNDS
EXCITONS
LANTHANUM COMPOUNDS
PHOTOLUMINESCENCE SPECTROSCOPY
SILICATES
TRAPPED IONS
ASYMMETRY COEFFICIENT
EMISSION BANDS
EU3+ ION
EXCITON EMISSION
F-F TRANSITIONS
INTRA-CONFIGURATIONAL TRANSITIONS
INTRACONFIGURATIONAL F-F TRANSITION
SCHEELITE
SELF TRAPPED EXCITONS
SPECTROSCOPIC FEATURES
PHOTOLUMINESCENCE
 
Описание The present work studies europium-ion spectroscopic features in solid solutions based on silicate-tungstates Ca2La6.8Eu1.2Si5.6W0.4O26.4 and Ca8Eu2Si3W3O26 microcrystalline powders with the crystal structure of silicate apatite and scheelite respectively. The spectroscopic features were studied by means of photoluminescence spectroscopy and X-ray excited luminescence at temperatures 4.6, 90 and 295 K. In Ca2La6.8Eu1.2Si5.6W0.4O26.4 only intensive luminescence was observed, which was characterized by a set of 5D0 → 7FJ dominant intraconfigurational transitions for Eu3+ ion. In Ca8Eu2Si3W3O26, both 5D0→ 7FJ intraconfigurational transitions for Eu3+ ion and wide 430 nm emission band corresponding to host self-trapped exciton (STE) emission are observed. This STE emission band is reabsorbed by the f – f absorption of Eu3+ ions by means of energy transfer from host to Eu3+. The asymmetry coefficient which characterizes the shape of the emission spectrum of Eu3+ ions strongly depends on the energy of exciting photons. The Eu3+ ion might occupy two nonequivalent crystallographic sites. Some features of this phenomenon were discussed. © 2022 The Author(s)
State Task, (0397-2019-0002)
Russian Foundation for Basic Research, РФФИ, (20-03-00851)
Russian Academy of Sciences, РАН
Ministry of Education and Science of the Russian Federation, Minobrnauka, (FEUZ-2020-0060)
Russian Science Foundation, RSF, (21-12-00392)
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, ISSC UB RAS
The work was partially supported by the Ministry of Science and Higher Education of the Russian Federation (through the basic part of the government mandate, project No. FEUZ-2020-0060 ) and RFBR (project No. 20-03-00851 ) and it is part of a State Task (No. 0397-2019-0002 ) for the Institute of Solid State Chemistry ( Ural Branch, Russian Academy of Sciences ). V.A.P. acknowledges partial support by Russian Science Found (Project No. 21-12-00392 ). Authors thank to Dr. I.D. Popov (Institute of Solid State Chemistry, UB RAS, Ekaterinburg, Russia) for editing the text of the manuscript.
 
Дата 2024-04-22T15:53:44Z
2024-04-22T15:53:44Z
2022
 
Тип Article
Journal article (info:eu-repo/semantics/article)
Published version (info:eu-repo/semantics/publishedVersion)
 
Идентификатор Pustovarov, VA, Vasin, AA & Zuev, MG 2022, 'Site-selective luminescence of Eu3+ ions in silicate-tungstates with apatite and scheelite structures', Optical Materials: X, Том. 15, 100186. https://doi.org/10.1016/j.omx.2022.100186
Pustovarov, V. A., Vasin, A. A., & Zuev, M. G. (2022). Site-selective luminescence of Eu3+ ions in silicate-tungstates with apatite and scheelite structures. Optical Materials: X, 15, [100186]. https://doi.org/10.1016/j.omx.2022.100186
2590-1478
Final
All Open Access; Gold Open Access
https://doi.org/10.1016/j.omx.2022.100186
https://doi.org/10.1016/j.omx.2022.100186
http://elar.urfu.ru/handle/10995/132487
10.1016/j.omx.2022.100186
85138446797
000866781400001
 
Язык en
 
Права Open access (info:eu-repo/semantics/openAccess)
cc-by-nc-nd
 
Формат application/pdf
 
Издатель Elsevier B.V.
 
Источник Optical Materials: X
Optical Materials: X