Preparation And Luminescence Properties Of Phosphate Glass Co-doped With Dy³⁺/Tm³⁺

Rare earth luminescent materials have an extremely important position in the fields of bio-imaging,solid-state lasers,and display illumination.The illuminating glass preparation process is simple and does not require an epoxy resin package to be a promising alternative to the phosphor material applied to the diode chip in the light emitting diode.Nowadays,doped rare earth ion phosphate glass has become a research hotspot.Compared with other glass,phosphate glass has the advantages of low phonon energy,low raw material price and high solubility to rare earth ions.In this paper,a phosphate glass material was prepared by selecting a suitable matrix formulation,and its luminescence properties and energy transfer between Dy³⁺and Tm³⁺and luminescence color at different concentrations were studied.In this paper,La₂O₃-P₂O₅ binary matrix materials were used to prepare Dy³⁺/Tm³⁺phosphate glasses with different concentrations by melt method.The phosphoric acid-doped Dy³⁺/Tm³⁺phosphate glass was subsequently tested for UV-visible transmission,excitation,emission,and fluorescence lifetimes.The UV-Vis transmission spectroscopy of single Dy³⁺/Tm³⁺doped glass shows that Dy³⁺/Tm³⁺has good absorption in the ultraviolet-visible range,and Dy³⁺/Tm³⁺is effective in ultraviolet excitation by excitation spectrum and emission spectrum Dy³⁺/Tm³⁺.The band,Dy³⁺emission peaks are located at 480,573 and 665 nm;Tm³⁺can be effectively excited in the 360-370 nm band,and the Tm³⁺emission peak is located at 453 nm,and corresponding to the ion level transition,respectively,and the chromaticity of the luminescent material at different concentrations is calculated.coordinate.The excitation spectrum of the two Dy³⁺/Tm³⁺doped glasses was determined by the excitation spectrum of the single Dy³⁺/Tm³⁺doped glass.The emission spectrum was tested by using the 350 nm excitation light source in combination with the transmission spectrum.The Dy³⁺was obtained according to the analysis of the emission peak intensity with concentration./Tm³⁺The energy transfer process between the two ions is Dy³⁺?Tm³⁺and Tm³⁺?Dy³⁺,respectively.The energy transfer method is used to describe the corresponding energy transfer mode of the emission peak,and then the fluorescence lifetime is tested,further illustrating Dy³⁺.Energy transfer between/Tm³⁺.Finally,the white light emission was obtained by adjusting the concentration.When Tm³⁺0.2mol%/Dy³⁺0.7mol%,the luminescent color closer to the standard white light was obtained.