期刊
JOURNAL OF LUMINESCENCE
卷 132, 期 11, 页码 3048-3052出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2012.06.018
关键词
Optical materials; Phosphor; Energy transfer; White LEDs
类别
资金
- National Natural Science Foundation of China [20976002]
- Beijing Natural Science Foundation [2122012]
- Jurisdiction of Beijing Municipality [PXM 2011_014213_113560, 113522]
Ce3+ and Tb3+ co-doped BaAl2B2O7 phosphors were synthesized by the solid-state method. X-ray diffraction (XRD) was used to characterize the phase structure. The photoluminescent properties of Ce3+ and Tb3+ co-doped BaAl2B2O7 phosphors were investigated by using the photoluminescence emission and excitation spectra. Under the excitation of near ultraviolet (n-UV) light, BaAl2B2O7:Ce3+,Tb3+ phosphors exhibited blue emission corresponding to the f-d transition of Ce3+ ions and green emission bands corresponding to the f-f transition of Tb3+ ions, respectively. Effective energy transfer occurred from Ce3+ to Tb3+ in BaAl2B2O7 host due to the observed spectra overlap between the emission spectrum of Ce3+ ion and the excitation spectrum of Tb3+ ion. The energy transfer efficiency from Ce3+ ion to Tb3+ ion was also calculated to be 71%. Furthermore, the concentration quenching and critical distance of BaAl2B2O7:Ce3+,Tb3+ phosphors were also discussed. The energy transfer from Ce3+ to Tb3+ in BaAl2B2O7 host was demonstrated to be resonant type via a dipole-dipole interaction mechanism with the energy transfer critical distance of 16.13 angstrom. (C) 2012 Elsevier B.V. All rights reserved.
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