Synthesis and luminescence properties of novel Ce^3＋-doped Yb3Al5-xGaxO12 garnets with very fast decay time  

作　　者：Ru Li Jie Yin Fei Du Peng Zhang Shangke Pan Jianguo Pan 

机构地区：[1]State Key Laboratory Base of Novel Functional Materials and Preparation Science. School of Material Science and Chemical Engineering. Ningho University,Zhejiang 315211. China [2]Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo 315211, China

出　　处：《Journal of Rare Earths》2018年第8期806-810,共5页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(11475242,51272263);K.C.Wong Magna Fund in Ningbo University

摘　　要：A novel series of Ce^3＋-doped Yb3 Al（5-x）GaxO（12）（x = 0, 1,2, 3,4, 5） powders of ytterbium aluminum gallium garnets were synthesized by high temperature solid-state reaction in a carbon reducing atmosphere. The ytterbium aluminum garnets were characterized by X-ray powder diffraction, UV-Vis diffuse reflectance spectra, photoluminescence spectra and decay curves. Moreover, the substitution effect for the Al^3＋ sites with Ga^3＋ in 0.5 at%Ce：Yb3 Al（5-x）GaxO（12）（x = 0,1, 2, 3, 4, 5） garnets were discussed. With the increase of Ga^3＋ ion concentration, the visible absorption peaks within 400-450 nm have blue shift phenomenon,while the absorption peaks in the range of 330-350 nm and the absorption band edge red shifts.Furthermore, the short decay times are very short with less than 10 ns due to the Yb^3＋ ＋ Ce^3＋→ Yb^2＋ ＋ Ce^4＋ electron transfer reaction.A novel series of Ce^3＋-doped Yb3 Al（5-x）GaxO（12）（x = 0, 1,2, 3,4, 5） powders of ytterbium aluminum gallium garnets were synthesized by high temperature solid-state reaction in a carbon reducing atmosphere. The ytterbium aluminum garnets were characterized by X-ray powder diffraction, UV-Vis diffuse reflectance spectra, photoluminescence spectra and decay curves. Moreover, the substitution effect for the Al^3＋ sites with Ga^3＋ in 0.5 at%Ce：Yb3 Al（5-x）GaxO（12）（x = 0,1, 2, 3, 4, 5） garnets were discussed. With the increase of Ga^3＋ ion concentration, the visible absorption peaks within 400-450 nm have blue shift phenomenon,while the absorption peaks in the range of 330-350 nm and the absorption band edge red shifts.Furthermore, the short decay times are very short with less than 10 ns due to the Yb^3＋ ＋ Ce^3＋→ Yb^2＋ ＋ Ce^4＋ electron transfer reaction.

关 键 词：Ytterbium aluminum gallium garnets High temperature solid-state reaction PHOTOLUMINESCENCE Decay time Rare earths 

分 类 号：TQ422[化学工程]