Structural Evolution and Effect of the Neighboring Cation on the Photoluminescence of Sr(LiAl3)1−x(SiMg3)xN4:Eu2+ Phosphors : научное издание | Научно-инновационный портал СФУ

Structural Evolution and Effect of the Neighboring Cation on the Photoluminescence of Sr(LiAl3)1−x(SiMg3)xN4:Eu2+ Phosphors : научное издание

Тип публикации: статья из журнала

Год издания: 2019

Ключевые слова: light-emitting diodes, Nitride phosphors, solid solutions

Аннотация: In this study, a series of Sr(LiAl3)1−x(SiMg3)xN4:Eu2+ (SLA-SSM) phosphors were synthesized by a solid-solution process. The emission peak maxima of SLA-SSM range from 615 nm to 680 nm, which indicates structural differences in these materials. 7Li solid-state NMR spectroscopy was utilized to distinguish between the Li(1)N4 and Li(2)N4 tetrahedra in SLA-SSM. Differences in the coordination environments of the two Sr sites were found which explain the unexpected luminescent properties. Three discernible morphologies were detected by scanning electron microscopy. Temperature-dependent photoluminescence and decay times were used to understand the diverse environments of europium ions in the two strontium sites Sr1 and Sr2, which also support the NMR analysis. Moreover, X-ray absorption near-edge structure studies reveal that the Eu2+ concentration in SLA-SSM is much higher than that in in SrLiAl3N4:Eu2+ and SrSiMg3N4:Eu2+ phosphors. Finally, an overall mechanism was proposed to explain the how the change in photoluminescence is controlled by the size of the coordinated cation.

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Издание

Журнал: Angewandte Chemie - International Edition

Выпуск журнала: Т. 58, 23

Номера страниц: 7767-7772

ISSN журнала: 14337851

Издатель: Wiley Interscience

Авторы

  • Fang M.H. (Department of Chemistry,National Taiwan University)
  • Liu R.S. (Department of Mechanical Engineering,and Graduate Institute of Manufacturing Technology,National Taipei University of Technology)
  • Mahlik S. (Institute of Experimental Physics,Faculty of Mathematics,Physics and Informatics,Gdańsk University)
  • Lazarowska A. (Institute of Experimental Physics,Faculty of Mathematics,Physics and Informatics,Gdańsk University)
  • Grinberg M. (Institute of Experimental Physics,Faculty of Mathematics,Physics and Informatics,Gdańsk University)
  • Molokeev M.S. (Department of Physics,Far Eastern State Transport University)
  • Sheu H.S. (National Synchrotron Radiation Research Center)
  • Lee J.F. (National Synchrotron Radiation Research Center)

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