| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7886534 | Ceramics International | 2018 | 21 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
G. Seeta Rama Raju, E. Pavitra, L. Krishna Bharat, Gattupalli Manikya Rao, Tae-Joon Jeon, Yun Suk Huh, Young-Kyu Han,