Tm^(3+)掺杂的新型铋酸盐玻璃的制备与光谱特性  

Fabrication and Spectral Properties of Tm^(3+)-doped Novel Bismuthate Glasses

作　　者：张宁 林志文 满石清[1] Zhang Ning;Lin Zhiwen;Man Shiqing(School of Physics and Electronic Information Science&Technology,Yunnan Normal University,Kunming 650500,China;School of Energy and Envi-ronment Science,Yunnan Normal University,Kunming 650500,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500 [2]云南师范大学能源与环境科学学院,云南昆明650500

出　　处：《中国稀土学报》2022年第1期54-59,I0002,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21661036和21361028)资助。

摘　　要：通过传统熔融法,分别制备了Tm^(3+)单掺和Tm^(3+)/Yb^(3+)共掺的新型铋酸盐玻璃Li_(2)O-SrO-ZnO-Bi_(2)O_(3)(LSZB),采用拉曼光谱、吸收光谱、荧光光谱对其进行了表征。应用Judd-Ofelt理论,计算了Judd-Ofelt参数Ω_(t)(t=2,4,6),分别为Ω_(2)=4.29×10^(−20)cm^(2),Ω_(4)=1.16×10^(−20)cm^(2)和Ω_(6)=0.84×10^(−20)cm^(2),及Tm3+的自发跃迁几率、荧光分支比以及辐射寿命等光谱参量。在808 nm波长的激发下,样品可以在1.47μm处观测到强烈^(3)H_(4)→^(3)F_(4)跃迁发射,带宽约为112 nm。样品中Tm^(3+)的^(3)H_(4)能级寿命为213.6μs,其量子效率达到83.4%。在980 nm激光激发下,Tm^(3+)/Yb^(3+)共掺的新型铋酸盐玻璃中观察到很强的476 nm的蓝色光、651 nm的红色光和800 nm的近红外上转换发光,同时研究了上转换发光强度与激发光能量的关系,并讨论了相应的上转换发光机制。Tm^(3+)-doped and Tm^(3+)/Yb^(3+)-codoped novel bismuthate glasses Li_(2)O-SrO-ZnO-Bi_(2)O_(3)(LSZB)were fabricated through the conventional melt-quenching method,and the spectroscopic properties of Tm^(3+) in the glasses were characterized.The density,the refractive indices,the optical absorption and the luminescence emission were measured.The Judd-Ofelt parameters Ω_(t) and the spontaneous transition probabilities of the glasses were calculated.By using the least-squares fitting method,the Judd-Ofelt intensity parameters Ω_(t) were found to be Ω_(2)=4.29×10^(−20)cm^(2),Ω_(4)=1.16×10^(−20)cm^(2)and Ω_(6)=0.84×10^(−20)cm^(2).Intense 1.47μm fluorescence was observed in these glass systems under 808 nm excitation.The emission peak from the^(3)H_(4)→^(3)F_(4)transition of Tm^(3+) locates around 1.47μm with a bandwidth was~112 nm.The lifetime of^(3)H_(4)was 213.6μs and its quantum efficiency reach to 83.4%.Intense blue(476 nm),red(651 nm)and near infrared(800 nm)upconversion emissions were obtained in Tm^(3+)/Yb^(3+)-codoped novel bismuthate glasses under excitation with a diode laser at 980 nm.The dependence of upconversion intensities on excitation power and possible upconversion mechanism were evaluated.

关 键 词：铥掺杂 JUDD-OFELT理论 铋酸盐玻璃 荧光 上转换 

分 类 号：TQ171.1[化学工程—玻璃工业]