期刊
OPTICAL MATERIALS
卷 62, 期 -, 页码 328-334出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2016.09.076
关键词
Tb/Ce codoped; Gadolinium aluminate garnet; Energy transfer; Luminescent property
资金
- National Natural Science Foundation of China [51402125, 51172038]
- research award fund for young and middle-aged scientist in Shandong Province [BS2014CL027]
- postdoctoral innovation project in Shandong Province [201603061]
- Research Fund for the Doctoral Program of University of Jinan [XBS1447]
- Science Foundation for Post Doctorate Research from the University of Jinan [172335]
- Science Foundation of University of Jinan [XKY1515]
The Gd3Al5O12:Tb/Ce (GdAG:Tb/Ce) garnet solutions effectively stabilized by Lu3+ have been achieved by calcining their precursor at 1300 degrees C. Detailed characterizations are given to the materials in terms of XRD, FE-SEM, BET, PL/PLE, and fluorescence decay analysis. The occurrence of Gd3+ and Tb3+ transitions from the photoluminescence excitation spectrum monitoring the Ce3+ yellow emission strongly confirmed the efficient Gd3+ -> Ce3+ and Tb3+ -> Ce3+ energy transfer. The [(Gd0.8Lu0.2)(0.99-x)Ce0.01Tbx]AG (x = 0-0.1) phosphors with good dispersion and uniform particle size exhibit various luminescent properties under different excitation wavelength of 275, 338, and 457 nm, respectively. The photoluminescence comparison indicated that owing to the Gd3+ -> Ce3+ and Tb3+ -> Ce3+ energy transfer, the best luminescent phosphor [Gd0.8Lu0.2)(0.89)Ce-0.01 Tb-0.1]AG is almost identical to the well-known YAG:Ce, higher than LuAG:Ce in emission intensity, and has a substantially red-shifted emission band that is desired for warm-white lighting. The Tb3+ -> Ce3+ energy transfer was suggested to be electric multipolar interactions, and the proCesses of energy migration among the optically active Gd3+, Tb3+, and Ce3+ ions were discussed in detail. Fluorescence decay analysis found the lifetime for the Ce3+ emission hardly changes with the Tb3+ incorporation. The [(Gd0.8Lu0.2)(0.99-x)Ce0.01Tbx]AG garnets developed in this work may serve as a new type of phosphor that hopefully meets the requirements of various lighting, optical display, and scintillation applications. (C) 2016 Elsevier B.V. All rights reserved.
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