Preparation And Properties Of Dy³⁺/Tb³⁺ Doped Borosilicate Glass

Fluorescence glass has the advantages of high luminous efficiency,good stability,high transparency and so on.It can be prepared into arbitrary shape and size,and can be drawn optical fiber,which is expected to be used to replace some of the crystals and ceramics applied in high energy physics and other fields,so it has a broad application prospect.In this paper,a series of B₂O₃-SiO₂-WO₃-Ga₂O₃ glasses doped with rare earth ions(Dy³⁺,Tb³⁺)were prepared by the melt-quenching method.The structure of the glass was characterized by X-ray diffraction and Fourier infrared spectra.The optical properties of the glass were analyzed and characterized by the absorption and transmission spectra,excitation spectra,emission spectra and fluorescence attenuation curves.At the same time,the physical properties of glass are tested and calculated.Dexter energy transfer formula is used to study the energy transfer mode in co-doped glass.Based on the above content,the following conclusion can be drawn:（1）In a series of prepared Dy³⁺-doped B₂O₃-SiO₂-WO₃-Ga₂O₃ glasses,when the Dy₂O₃doping concentration was 0.5 mol%,B₂O₃:SiO₂ is 50:33 and K₂O concentration is 4 mol%,at 388 nm excitation light,B₂O₃-SiO₂-WO₃-Ga₂O₃ glass has the best luminous performance,the CIE coordinate is（0.3101,0.3583）and the correlated color temperature（CCT）of glass is 6452 K.（2）In a series of prepared Tb³⁺-doped B₂O₃-SiO₂-WO₃-Ga₂O₃ glasses,when the Tb₂O₃doping concentration was 1.5 mol%,B₂O₃:SiO₂ is 50:33 and K₂O concentration is 4 mol%,at 378 nm excitation light,B₂O₃-SiO₂-WO₃-Ga₂O₃ glass has the best luminous performance,the CIE coordinate is（0.2650,0.6261）and the CCT of glass is 6653 K.（3）In a series of prepared Dy³⁺/Tb³⁺co-doped B₂O₃-SiO₂-WO₃-Ga₂O₃ glasses,when the Dy₂O₃ and Tb₂O₃ doped concentrations were 0.5 mol%and 1.0 mol%,K₂O concentration is 2 mol%,B₂O₃-SiO₂-WO₃-Ga₂O₃ glass has the best luminescent performance under the excitation of 378 nm wavelength,and the energy transfer mode from Dy³⁺to Tb³⁺is electric dipole-electric dipole,energy transfer efficiency is 87%,the CIE coordinate of glass is（0.2615,0.6143）close to the standard green light,color purity is 66.1%,CCT of glass is 6752K,can be potential candidates for green light solid-state device applications.