Synthesis and luminescent properties of (RE0.95Ln0.05)2O2S (RE = La, Y; Ln = Ho, Tm)

Описание

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1016/j.jssc.2020.121753

Ключевые слова: lifetime, luminescence, quantum yield, rare earth oxysulfides, rietveld, synthesis

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 particleПоказать полностьюs 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. © 2020 Elsevier Inc.

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Издание

Журнал: Journal of Solid State Chemistry

Выпуск журнала: Vol. 293

Номера страниц: 121753

ISSN журнала: 00224596

Издатель: Academic Press Inc.

Авторы

  • Sal'nikova E.I. (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)
  • Denisenko Y.G. (Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation)
  • Kolesnikov I.E. (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)
  • Lähderanta E. (Department of Physics, Lappeenranta University of Technology LUT, Lappeenranta, 53850, Finland)
  • Andreev O.V. (Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation, Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation)
  • Azarapin N.O. (Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation)
  • Basova S.A. (Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation)
  • Gubin A.A. (Laboratory of Electron and Probe Microscopy, Tyumen State University, Tyumen, 625003, Russian Federation)
  • Oreshonkov A.S. (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)

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