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ELECTRIC AND MAGNETIC-PROPERTIES OF MES.FE2O3 OXYSULFIDES / G. V. LOSEVA [и др.] // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 6. - P. 1765-1769. - Cited References: 16 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
INSULATOR TRANSITION

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Доп.точки доступа:
LOSEVA, G. V.; MUKOED, G. M.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; RYABINKINA, L. I.
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Synthesis and optical properties RE2O2S:Ln (RE = La, Y; Ln = Ce, Eu, Dy, Er) / E. I. Sal'nikova [et al.] // J. Solid State Chem. - 2019. - Vol. 279. - Ст. 120964, DOI 10.1016/j.jssc.2019.120964. - Cited References: 53 . - ISSN 0022-4596
Кл.слова (ненормированные):
Oxysulfides -- Sulfates -- Rare-earth -- Reduction -- Optical ceramic -- Luminescence
Аннотация: The phase formation sequence was studied in the preparation of solid solutions of RE2O2S: Ln’ (RE = La, Y; Ln’ = Ce, Eu, Dy, Er) by the reduction of the match co-precipitated sulfates, followed by sulfidization of the reduction products. For uniform distribution of cations in the matrix, a method of chemical homogenization was used, consisting in the preparation of an aqueous solution containing all the necessary cations and their subsequent precipitation in the form of sulfates. The use of sulfates as precursors facilitates the process of obtaining solid solutions of oxysulfides, since sulfates already contain SO4 2--ions. The phase and morphological certification of the obtained solid solutions was carried out. The study of steady state luminescent properties demonstrated characteristic bands which are assigned to 4f-4f and 5d-4f transition. The obtained results showed the possibility of applying the method to synthesize optical ceramics based on solid solutionsRE2O2S: Ln (RE = La, Y; Ln = Ce, Eu, Dy, Er).

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Department of General Chemistry, Northern Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Center for Optical and Laser Materials Research, St. Petersburg State University, St. Petersburg, 199034, Russian Federation
Department of Physics, Lappeenranta University of Technology LUT, Lappeenranta, 53850, Finland

Доп.точки доступа:
Sal'nikova, E. I.; Denisenko, Y.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kolesnikov, I. E.; Lahderanta, E.; Andreev, P. O.; Azarapin, N. O.; Andreev, O. V.; Basova, S. A.; Matigorov, A. V.
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Synthesis and luminescent properties of (RE0.95Ln0.05)2O2S (RE = La, Y; Ln = Ho, Tm) / E. I. Sal'nikova, Y. G. Denisenko, I. E. Kolesnikov [et al.] // J. Solid State Chem. - 2021. - Vol. 293. - Ст. 121753, DOI 10.1016/j.jssc.2020.121753. - Cited References: 33 . - ISSN 0022-4596
Кл.слова (ненормированные):
Rare earth oxysulfides -- Synthesis -- Rietveld -- Luminescence -- Lifetime -- Quantum yield
Аннотация: Solid solutions of oxysulfides (RE0.95Ln0.05)2O2S (RE = La, Y; Ln = Ho, Tm) were obtained by hydrogen reduction of the co-precipitated sulfates followed by sulfidation of the reaction products. The crystal chemical characteristics of the obtained compounds were refined by the Rietveld method. Morphological certification of particles in the dynamics of synthesis was performed. Most of the particles produced by chemical reactions have a cut that indicates the formation of a compound with a hexagonal syngony with angles of 60 and 120°. This indicates that the thermal effect of gaseous reagents H2, H2S on sulfates leads to heterogeneous reactions of thermal dissociation and the formation of new phases. Steady state luminescence properties displayed characteristic sharp bands corresponding to 4f-4f transitions. Luminescence decay curves of all studied samples showed monoexponential decay with microsecond and hundreds microsecond lifetimes depending on doping ions. Calculated color coordinates of Ho3+ and Tm3+-doped powders make them promising candidates to be used as phosphors.

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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Komissarov Department of General Chemistry, Northen Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Center for Optical and Laser Materials Research, St. Petersburg State University, St. Petersburg, 199034, Russian Federation
Department of Physics, Lappeenranta University of Technology LUT, Lappeenranta, 53850, Finland
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation
Laboratory of Electron and Probe Microscopy, Tyumen State University, Tyumen, 625003, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Sal'nikova, E. I.; Denisenko, Y. G.; Kolesnikov, I. E.; Lahderanta, E.; Andreev, O. V.; Azarapin, N. O.; Basova, S. A.; Gubin, A. A.; Oreshonkov, A. S.; Орешонков, Александр Сергеевич
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