Enhanced green upconversion luminescence properties of Er<sup>3+</sup>/Yb<sup>3+</sup> co-doped strontium gadolinium silicate oxyapatite phosphor


  • Raju G.
  • Pavitra E.
  • Bharat L.
  • Rao G.
  • Jeon T.
  • Huh Y.
  • Han Y.
Дата публикации:15.08.2018
Журнал: Ceramics International
БД: Scopus
Ссылка: Scopus
Индекс цитирования: 1

Аннтотация

© 2018 Elsevier Ltd and Techna Group S.r.l. Upconversion Sr2(Gd.98-xEr.02Ybx)8Si6O26 (SGSO:2Er3+/xYb3+) phosphor materials were synthesized using a citrate sol-gel process. X-ray diffraction patterns confirmed their hexagonal structure. Field emission scanning electron microscopy images of SGSO:2Er3+/xYb3+ phosphors depicted submicron particles. The enhanced upconversion luminescence properties of SGSO:2Er3+/xYb3+ phosphors were analysed as a function of Yb3+ ion concentration and laser power. The energy transfer induced enhanced emission of the Er3+/ Yb3+ ions co-doped SGSO phosphors was ascribed to multi-phonon relaxation. The calculated chromaticity coordinates of the SGSO:2Er3+/xYb3+ phosphors showed emissions could be tuned by changing Yb3+ ion concentration. Optimized sample exhibited the chromaticity coordinate values near to the ultra-high definition television standard green emission coordinates.


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