Chromaticity Test And Simulation Study Of White Light Fluorescence Characteristics Of Dy³⁺:ZBAN Glass

A standard white light source which emitting specific white light,as a benchmark for color evaluation,plays an important role in the field of color sensing.The research on new light-emitting materials(such as white LEDs)with standard white light-emitting properties has great benefits for the development of color sensing.Rare earth doped glass has attracted much attention as a fluorescent material with excellent light emitting properties,and has been widely studied in the field of light emitting.In this paper,we have studied the white light emitting characteristics of Dy³⁺doped Zr F4-Ba F2-Al F3-Na F(Dy³⁺:ZBAN)glass.The main research contents and results are as follows:A series of Dy³⁺:ZBAN glass was prepared by the melting-quenching method and its physical properties were measured.A Judd-Ofelt theoretical model was established,and the absorption spectrum data was analyzed by J-O modeling program,and the J-O intensity parameters were fitted.The theoretical spectral characteristics of the glass were obtained through the calculation of the J-O intensity parameters,and the relationship between simulated and theoretical fluorescence spectrum of glass was analyzed.Under the excitation of ultraviolet light,the emission spectrum of the glass was measured,and characteristic peaks of the glass sample on yellow light(480 nm),blue light(575 nm),and red light(660 nm)were observed.The chromaticity analysis of the fluorescence spectrum was performed to obtain the chromaticity parameters of the spectrum,and the change of the fluorescence chromaticity coordinates when the Dy³⁺doping concentration was changed was studied.In order to find the fluorescence closest to equal energy white light,the chromaticity difference between the fluorescence and equal energy points was calculated.The process and results of color sensing using Dy³⁺:ZBAN glass fluorescence as a simulated light source are simulated,and the rationality of glass for color sensing in this subject is analyzed.These results prove that Dy³⁺:ZBAN glass is a suitable material for use as a standard white light source that emits white light of equal energy.