Synthesis and luminescence characterization of Pr3+, Gd3+ co-doped SrF2 transparent ceramics
Synthesis and luminescence characterization of Pr3+, Gd3+ co-doped SrF2 transparent ceramics
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Pr3、Gd3共掺杂SrF2透明陶瓷的合成及发光表征
DOI：
10.1111/jace.16728
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发表时间：
2019
影响因子：
3.9
通讯作者：
Liangbi Su
中科院分区：
文献类型：
--
作者：
Guoqiang Yi;Bingchu Mei;Weiwei Li;Jinghong Song;Zuodong Liu;Zhiwei Zhou;Liangbi Su
采用热压法制备了Pr 3+，Gd 3+共掺杂的SrF 2透明陶瓷，作为潜在的可见光发光材料。系统地研究了样品的微观结构、相组成、在线透射率以及光致发光性能。在800°C下保温1.5小时，获得了具有几乎无孔微观结构的高光学质量Pr，Gd：SrF 2透明陶瓷。X.%的平均在线透射率Pr，6at.% Gd：SrF_2（x= 0.2，0.5，1.0，2.0）陶瓷在红外区的透光率达到87.3%。在444 nm激发下，样品的光致发光光谱呈现出强烈的可见光发射，主要的本征发射带位于483和605 nm，分别归属于Pr 3+的3 P0 → 3 H4和1D 2 → 3 H4跃迁。随着Gd 3+离子的共掺杂，Pr：SrF 2透明陶瓷的发光强度大大增强。Xat.%的所有发射带Pr，6at.% Gd：SrF 2透明陶瓷在1.0at.%时发光强度最高Pr ~（3+）掺杂浓度从0.2at.%增加到2.0at.%时，寿命急剧下降由于其强烈的浓度猝灭效应。1 at.% Pr，6at.% Gd：SrF 2透明陶瓷是一种很有前途的可见光发光器件材料。
Pr3+, Gd3+co‐doped SrF2transparent ceramic, as the potential material for visible luminescent applications, was prepared by hot‐pressing of precursor nanopowders. The microstructure, phase compositions, and in‐line transmittance, as well as the photoluminescence properties were investigated systematically. Highly optical quality Pr,Gd:SrF2transparent ceramic with nearly pore‐free microstructure was obtained at 800°C for 1.5 hours. The average in‐line transmittance of thexat.% Pr, 6 at.% Gd:SrF2(x= 0.2, 0.5, 1.0, 2.0) transparent ceramics reached to 87.3 % in the infrared region. The photoluminescence spectra presented intense visible light emissions under the excitation of 444 nm, the main intrinsic emission bands located at 483 and 605 nm, which were attributed to the transitions of Pr3+:3P0→3H4and1D2→3H4, respectively. With the co‐doping of Gd3+ions, the emission intensity of the Pr:SrF2transparent ceramic was greatly enhanced. All the emission bands ofxat.% Pr, 6 at.% Gd:SrF2transparent ceramics exhibited the highest luminescence intensity with the 1.0 at.% Pr3+doping concentrations, whereas the lifetimes decreased dramatically with the Pr3+doping contents increasing from 0.2 to 2.0 at.% due to its intense concentration quenching effect. The 1 at.% Pr, 6 at.% Gd:SrF2transparent ceramic is a promising material for visible luminescent device applications.