期刊
CERAMICS INTERNATIONAL
卷 44, 期 12, 页码 13852-13857出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.04.231
关键词
Sol-gel process; Submicron particle; Upconversion luminescence; Energy transfer; Green emission
资金
- National Research Foundation of Korea (NRF) grant - Ministry of Science, ICT and Future Planning of Korea [2017M2A2A6A01020938, 2014R1A5A1009799]
- Inha University WCSL research grant
Upconversion Sr-2(Gd-0.98-xEr(.02)Yb(x))(8)Si6O26 (SGSO:2Er(3+)/xYb(3+)) 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:2Er(3+)/xYb(3+) phosphors depicted submicron particles. The enhanced upconversion luminescence properties of SGSO:2Er(3+)/xYb(3+) 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:2Er(3+)/xYb(3+) 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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