Synthesis, luminescent properties and theoretical calculations of novel orange-red-emitting Ca2Y8(SiO4)6O2:Sm3+ phosphors for white light-emitting diodes

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.dyepig.2017.10.047

Ключевые слова: Ca<inf>2</inf>Y<inf>8</inf>(SiO<inf>4</inf>)<inf>6</inf>O<inf>2</inf>, phosphor, photoluminescence, solid state reaction

Аннотация: The novel orange-red-emitting Ca2Y8(SiO4)6O2:Sm3+ phosphors (CYSO:Sm3+) were synthesized via conventional a solid state reaction. The crystal structure and atomic coordinates of CYSO:Sm3+ was characterized by Rietveld refinement. Luminesce properties of as-synthesized CYSO:Sm3+ phosphors are carried out by PL/PLE, decay life time, thermal quenching as well as reflectance spectrometer and LED fabrications. The results indicates that composition-optimized CYSO:1%Sm3+ exhibits orange-red emission peaks located on 564, 601, 608 and 648 nm attributed to the transitions of 4G5/26H5/2, 4G5/26H7/2, 4G5/26H7/2 and 4G5/26H9/2, respectively. The decay lifetime of CYSO:Sm3+ phosphors was in the range of 0.37–1.10 ms. The temperature-dependent photoluminescence is decreased to 80% from room temperature to 150 °C, which is superior to that of commercial red phsophpr-Y2O3:Eu3+. The results of LED fabrication by combing 405 chips and blue/green phosphors are demonstrated in this study. Finally, from viewpoint of theoretical calculations, band structure and density of state for CYSO and CYSO:Sm3+ are studied by first principles calculations. All the results indicate that CYSO:Sm3+ phosphors could be a potential material for white light-emitting diodes.

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Издание

Журнал: Dyes and Pigments

Выпуск журнала: Т.150, №

Номера страниц: 121-129

ISSN журнала: 01437208

Издатель: Elsevier Science Publishing Company, Inc.

Авторы

  • Chen C.T. (National Chung Shan Institute of Science & Technology)
  • Lin T.J. (Department of Chemical Engineering,Chung Yuan Christian University)
  • Liu W.R. (Department of Chemical Engineering,Chung Yuan Christian University)
  • Molokeev M.S. (Siberian Federal University)

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