期刊
JOURNAL OF LUMINESCENCE
卷 93, 期 2, 页码 107-114出版社
ELSEVIER
DOI: 10.1016/S0022-2313(01)00182-X
关键词
photoluminescence; energy transfer; sensitization; CaAl4O7 : Tb3+/Ce3+
类别
Samples of CaAl4O7 doped with Tb3+, Ce3+, and Tb3+ and Ce3+, respectively are prepared by sintering. Microstructures are analyzed by X-ray diffraction and high-resolution transmission electron microscope experiments. The samples show single monoclinic phase. The blue Ce3+ emission at 440 nm is efficiently quenched in the sample of CaAl4O7:Tb3+, Ce3+, in which the dominant emission is in the green at 545 nm, originating from the transition of D-5(4) to F-7(5). Excitation spectrum of the CaAl4O7 : Tb3+, Ce3+, monitoring at 545 nm of the green emission, consists of both contributions from Ce3+ and Tb3+. 95% of total energy of Tb3+ green emission is transferred from Ce3+. (C) 2001 Elsevier Science B.V. All rights reserved.
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