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Transparent bulk glass ceramics of 4.5ZnO-5.5Al2O3-90SiO2 (ZAS) and single doped ZAS:RE3+ (RE=Eu, Tb, Ce) were synthesized by sol-gel method. X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence (PL) spectra were employed to study the influence of doping rare-earth ions concentration on the structure and luminescence properties of ZAS glass-ceramics. XRD results show that ZAS:RE3+ (RE=Eu, Tb, Ce) glass ceramics heat-treated at 900 consist of ZnAl2O4 phase with average grain size of 30 nm and amorphous SiO2.TEM results show that ZnAl2O4 were precipitated from ZAS system when heat-treated at 900 , and doping ions have not changed the original structure. PL spectra indicate that ZAS:Eu3+ emits intense 611 nm red light originating from 5D0→7F2 transition of Eu3+ ions, ZAS:Tb3+ shows 541 nm green emission attributed to 5D4→7F5 transition of Tb3+ ions, and ZAS:Ce3+ gives 381 nm blue light corresponding to the 5d to 4f transition of Ce3+ ions. Furthermore, the concentration quenching phenomena are observed while the single doping mole fraction of Eu3+, Tb3+ and Ce3+ was 20%, 20% and 3%, respectively. The excellent Commission International de I'Eclairage (CIE) chromaticity coordinates of ZAS:RE3+ (RE=Eu, Tb, Ce) glass-ceramics indicate that they are good candidates for the application of white LEDs. ©, 2015, Chines Academy of Sciences. All right reserved.
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Chinese Journal of Luminescence
ISSN: 1000-7032
CN: 22-1116/O4
Year: 2015
Issue: 4
Volume: 36
Page: 400-407
Cited Count:
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 6
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