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 (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia; Northen Trans Ural Agr Univ, Komissarov Dept Gen Chem, Tyumen 625003, Russia)
  • Denisenko Yu G. (Ind Univ Tyumen, Dept Gen & Special Chem, Tyumen 625000, Russia)
  • Kolesnikov I.E. (St Petersburg State Univ, Ctr Opt & Laser Mat Res, St Petersburg 199034, Russia; Lappeenranta Univ Technol LUT, Dept Phys, Lappeenranta 53850, Finland)
  • Lahderanta E. (Lappeenranta Univ Technol LUT, Dept Phys, Lappeenranta 53850, Finland)
  • Andreev O.V (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia; UB RAS, Lab Chem Rare Earth Cpds, Inst Solid State Chem, Ekaterinburg 620137, Russia)
  • Azarapin N.O. (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia)
  • Basova S.A. (Tyumen State Univ, Dept Inorgan & Phys Chem, Tyumen 625003, Russia)
  • Gubin A.A. (Tyumen State Univ, Lab Electron & Probe Microscopy, Tyumen 625003, Russia)
  • Oreshonkov A.S. (Siberian Fed Univ, Krasnoyarsk 660041, Russia; KSC SB RAS, Fed Res Ctr, Kirensky Inst Phys, Lab Mol Spect, Krasnoyarsk 660036, Russia)

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