Sol-gel Synthesis And Luminescent Properties Of Rare-earth Borate Luminescent Materials

Rare earth luminescent materials are very important functional materials, rare earth ions were widely used in the field of luminescent materials due to their special electronic configuration, stable physicochemical property, longer level lifetime and abundant energy level structure, ability to act as a luminescent center when doped to the appropriate matrix material, moreover, abundant photoluminescence can be obtained in the excitation of near UV or blue light. The structure of rare earth borate determine that it has high stability, and thus making it an excellent matrix of luminescent material.luminescence materials with the matrix of borate were considered to be promising practical luminous substrate, because of their low reaction temperature, easy preparation, high UV transmission and high optics damage threshold. In addition, the price of borate phosphor is cheaper than that of the rare earth oxide-matrix phosphor, and the chemical properties are different from the alkaline earth metal borates.In this paper, a series of rare earth borate luminescent materials doped with rare earth trivalent ions were synthesized by using sol-gel methods, and the luminescent properties were characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared Reflectance Spectroscopy(FT-IR), fluorescence excitation and emission spectrum. The detailed research are as follows:Synthetic of LnBO3:Re (Ln=La, Lu, Gd, Y; Re=Eu3+, Tb3+, Dy3+) using sol-gel methods and characterized it with XRD, FI-IR and fluorescence excitation and emission spectrum; Eu3+ doped LnB03:Eu3+ luminescence material appeared red under the excitation of near ultraviolet light; Tb3+ doped LnBO3:Tb3+ luminescence material appeared green under the excitation of near ultraviolet light; Dy3+ doped LnBO3:Dy3+ luminescence material appeared green under the excitation of near ultraviolet light.Synthetic of Sr3Ln2(BO3)4:Re (Ln=La, Lu, Gd, Y; Re=Tb3+, Ce3+) using sol-gel methods and characterized it with XRD, FI-IR and fluorescence excitation and emission spectrum; Tb3+ doped Sr3Ln2(BO3)4:Tb3+ luminescence material appeared green under the excitation of near ultraviolet light; Ce3+ doped Sr3Ln2(BO3)4:Ce3+ luminescence material appeared blue under the excitation of near ultraviolet light.Synthetic of Ln2Al2(BO3)4:Re (Ln=Y, Gd; Re= Eu3+, Tb3+) using sol-gel methods and characterized it with XRD, FI-IR and fluorescence excitation and emission spectrum; Eu3+ doped Ln2Al2(BO3)4:Eu3+ luminescence material appeared reddish orange under the excitation of near ultraviolet light; Tb3+ doped Ln2Al2(BO3)4:Tb3+ luminescence material appeared green...