Synthesis-dependent luminescence properties of Y3Al5O12:Re3+ (Re=Ce, Sm, Tb) phosphors
Synthesis-dependent luminescence properties of Y3Al5O12:Re3+ (Re=Ce, Sm, Tb) phosphors
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DOI：
10.1016/s0167-577x(02)00567-0
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发表时间：
2002-11-01
影响因子：
3
通讯作者：
Zhang, HJ
中科院分区：
文献类型：
--
作者：
Zhou, YH;Lin, J;Zhang, HJ
以金属硝酸盐和氧化物为原料，采用固相法（SS）、共沉淀法（CP）和柠檬酸盐凝胶法（CG）制备了Y2 Al 5 O 12（YAG）和YAG：Re 3+（Re = Ce，Sm，Th）荧光粉。采用XRD、FT-IR、SEM、荧光激发光谱和发射光谱等手段对样品进行了表征。在800 ℃（CG）和900 ℃（CP，SS）下获得了纯化的YAG晶相。在相同的退火温度和掺杂浓度下，掺杂的稀土离子在CP和SS衍生的磷光体中显示出比CG衍生的YAG磷光体更强的发射强度。CG衍生的磷光体的差的发射强度主要是由来自起始材料中的柠檬酸的碳杂质的污染引起的。(C)2002 Elsevier Science B. V.保留所有权利。
By using metal nitrates and oxides as the starting materials, Y2Al5O12 (YAG) and YAG:Re3+ (Re = Ce, Sm, Th) powder phosphors were prepared by solid-state (SS), coprecipitation (CP) and citrate gel (CG) methods. The resulting YAG and YAG-based phosphors were characterized by XRD, FT-IR, SEM and photoluminescent excitation and emission spectra. The purified crystalline phases of YAG were obtained at 800 degreesC (CG) and 900 degreesC (CP, SS). At an identical annealing temperature and doping concentration, the doped rare-earth ions showed the stronger emission intensity in the CP- and SS-derived phosphors than the CG-derived YAG phosphors. The poor emission intensity for the CG-derived phosphors is mainly caused by the contamination of carbon impurities from citric acid in the starting materials. (C) 2002 Elsevier Science B.V. All rights reserved.