Study On The Synthesis And Properties Of Tb³⁺ Single Doped And Tb³⁺、Ce³⁺ And Ce³⁺、Eu³⁺ Co-Doped Luminescent Sodalite Materials

In this paper,we have carried on the frame likesodalite silicate luminescent materials doped Tb³⁺ 、 co-doped Tb³⁺, Ce³⁺ 、 co-doped Eu³⁺, Bi³⁺,and detailed research of light-emitting characteristics of them. Thier structures, morphology,luminous performance, color purity and luminescence quantum efficiencywere characterized by using the X-ray diffractometer（XRD）, scanning electronmicroscope（SEM）, The international Commission on illumination（CIE） standard colorimetric system, and the Steady/transient testing methods.1·A series of Na₈Al₆Si₆O₂₄Cl₂:x%Tb³⁺（x=1,3,5,7,9）phosphors were synthesized under a weak reducing atmosphere by traditional solid state reaction.The research found that the samples are composed of similar diamond twelve plane particle what are different size and irregular polyhedron structure. The samples could be excited efficiently by 242 nm(corresponding to the transition 7FJ�'9DJ in Tb³⁺)and emitted green fluorescence with better monchromaticity. The color coordinate of the green fluorescence was（0.3240,0.5872）, the color purity was 87.4%, and the luminescent quantum efficiency was 0.74.With the increase of Tb³⁺ doping concentration, the concentration quenching phenomenon occured. When the concentration was 5%, the strongest Tb³⁺ green emission can be realized. The results showed that the samples may meet the use requirements of PDP device. And they could be used as the green group of tri-phosphor materials. In the field of luminescent materials, synthetic sodalite fluorescent phosphor had a certain potential application value.2·A series of Na₈Al₆Si₆O₂₄Cl₂:3%Ce³⁺, x%Tb³⁺（ x=1, 2, 3, 4, 5）phosphors were synthesized under a weak reducing atmosphere by traditional solid state reaction. The research found that in the Ce³⁺ and Tb³⁺ co-doped samples, the energy transfer of Ce³⁺ to Tb³⁺ was observed for the electric dipole-dipole moment interaction, so we got the rich Tb³⁺ excitations. With the increase of the Tb³⁺doping concentration, the color coordinates of sodalite fluorescent phosphor changed from blue light to green light. The results showed that the energy transfer between Ce³⁺ and Tb³⁺ enhances the emission of Tb³⁺under the long wave ultraviolet light,and enrich the excitation of Tb³⁺.The bicolor phosphors has a great potential application value in the field of luminescent materials.3·A series ofNa₈Al₆Si₆O₂₄Cl₂: Eu³⁺, Bi³⁺ red phosphors were synthesizedby traditional solid state reaction.The synthetic products is sodalite structure,Belonging to the cubic crystal system.Under255 nmexcitation the orangered fluorescence lied near 642 nm are due to 4T2g�'6A1g transition of Mn2+.From the excitation and emission spectra found that the relative luminous intensity is increasedwith Bi³⁺doping,It shows that the Bi³⁺ doping has a significant sensitization to Eu³⁺.When the concentration of Bi³⁺ is 5%luminescence intensitwas maximum.