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

Pustovarov, V. A.; Vasin, A. A.; Zuev, M. G.

doi:10.1016/j.omx.2022.100186

Please use this identifier to cite or link to this item: http://elar.urfu.ru/handle/10995/132487

Title:	Site-selective luminescence of Eu3+ ions in silicate-tungstates with apatite and scheelite structures
Authors:	Pustovarov, V. A. Vasin, A. A. Zuev, M. G.
Issue Date:	2022
Publisher:	Elsevier B.V.
Citation:	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
Abstract:	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)
Keywords:	APATITE ASYMMETRY COEFFICIENT EU<SUP>3+</SUP> 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
URI:	http://elar.urfu.ru/handle/10995/132487
Access:	info:eu-repo/semantics/openAccess cc-by-nc-nd
SCOPUS ID:	85138446797
WOS ID:	000866781400001
PURE ID:	cfa0e503-c58a-4853-b7f7-2341c11f042b 30982543
ISSN:	2590-1478
DOI:	10.1016/j.omx.2022.100186
Sponsorship:	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.
Appears in Collections:	Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

Files in This Item:

File	Description	Size	Format
2-s2.0-85138446797.pdf		5,66 MB	Adobe PDF	View/Open

Show full item record