Er^(3+)/Yb^(3+)共掺氟化物颗粒的红外光谱特性及Judd-Ofelt理论分析

Near-Infrared Spectroscopic Properties and Judd-Ofelt Theory Analysis of Er^(3+)/Yb^(3+) Co-Doped Fluoride Particles

制备了Er3+/Yb3+共掺氟化物基质颗粒并对其吸收光谱进行测试。研究了不同基质、煅烧温度以及不同的Er3+/Yb3+共掺比例对颗粒在980nm及1550nm波段附近吸收特性的影响。应用Judd-Ofelt(J-O)理论对样品光谱进行了分析,拟合得到强度参数为Ω2=9.9887,Ω4=2.7333,Ω6=0.4868。结果表明,样品通过高温热处理提高了声子辅助跃迁几率,提高了能量转化效率。Er3+/Yb3+以1:6比例混合共掺时吸收性能最好。J-O理论分析表明,氟化物颗粒有较低的声子能量,Er3+/Yb3+共掺氟化物材料具有较好的红外吸波特性,是一种很好的红外上转换材料。

Er^3＋/Yb^3＋ ion co-doped fluoride particles are synthesized and analyzed by their absorption spectra.The influence of the substances,the calcination temperature,and the doping ratio of Er^3＋ and Yb^3＋ on the absorption of the synthesized materials are studied.By analyzing the spectra of the samples with the Judd-Ofelt（J-O）theory,the intensity parameters are obtained asΩ2=9.9887,Ω4=2.7333,Ω6=0.4868,respectively.The results show that the phonon assisted transition probability and the energy transfer efficiency increases after heat treatment of the samples.The best doping ratio of Er^3＋ and Yb^3＋ is 1：6.Analysis based on the Judd-Ofelt theory shows that the synthesized fluoride particles have low phonon energy and good absorption property in the near-infrared region after doping with Er^3＋ and Yb^3＋ ions.It can be used as a kind of good materials for near-infrared upconversion.