Rare Earth Doped Chlorine Silicate Phosphor Of Luminescense Characteristias And Its Mechanism

White LED has such advantages of energy-saving, no pollution, smartsize, long life and so on. So it have been gradually replace traditionalincandescent lamp, fluorescent lamp, halogen lamps and other solid lightingsource, become a new generation of lighting source. At present, thecommercialization of white LED used to the blue LED chip mixed yttriumaluminum garnet （YAG） yellow phosphor combinations to launch the whitelight. The main launched white light is blue LED chip mixed YAG:Ce³⁺, Buthigh light white LED by the blue LED pumped yellow-emitting YAG:Ce³⁺with this pattern has the following problems: poor color reducing, low colorrendering index, high color temperature, poor stability in high temperature.Fluorescent materials mainly were prepared by high temperature solid statereaction. It required high temperature, and equipment requirements increased,the phosphor particles and the range of particle size distribution are larger.Therefore, we research a single matrix new phosphor by the otherpreparation methods that have great significance.In this paper, chlorine silicate white LED phosphor was prepared bysol-gel method. The new chlorine silicate phosphor can be effective excitedby ultraviolet （near ultraviolet） LED. Also the luminous property of all kindsof phosphor was researched.（1） Both Ca₁₀Si₆O₂₁Cl₂:Eu³⁺and Ca₂SiO₃Cl₂:Eu³⁺red phosphors wereprepared by sol-gel method. XRD, SEM and other tests were adopted todetermine the calcinating process （sintering temperature and holding time）of the samples; and characterized the luminous property of phosphor byfluorescence spectrophotometer. The results showed that: Two kinds ofchlorine silicate matrix of the red phosphors excitation peak were both located in about394nm, the emission peak were located in the red areas.That means the phosphor can serve as currently has the white light of thecommercialization of LED red phosphors compensation powder, can also actas a nearly ultraviolet LED and three different schemes of combination ofwhite light devices candidate materials.（2） MgCaSiO₃Cl₂:Eu²⁺blue phosphor was prepared by sol-gel methodin the active carbon weak reducing atmosphere. DSC-TG, XRD and othertests were adopted to determine the calculating process （sinteringtemperature and holding time） of the MgCaSiO₃Cl₂: Eu²⁺phosphor. Theemitting mechanism of MgCaSiO₂3Cl₂:Eu+blue phosphor was discussed.Then, the luminescence properties of MgCaSiO₂+3Cl₂: Euphosphor and theeffect of the doping of Eu²⁺, sintering temperature and holding timeMgCaSiO₃Cl₂based phosphors was investigated. The results showed that:the MgCaSiO₃Cl₂:Eu²⁺phosphors excitation peak were located in350nm,the emission peak were located in448nm.（3） The Ca₂SiO₃Cl₂:Dy³⁺phosphor was prepared by the sol-gel methodin the active carbon weak reducing atmosphere. XRD and other tests wereadopted to determine the calculating process. The emitting mechanism ofCa32SiO₃Cl₂:Dy+white phosphor was discussed. Then, the luminescenceproperties of Ca₂SiO_<sub>3Cl_<sub>2:Dy³⁺phosphor and the effect of the doping of Dy³⁺,sintering temperature and holding time Ca₂SiO₃Cl₂:Dy³⁺based phosphorswas investigated. The results showed that: the Ca₂SiO₃Cl₂: Dy³⁺phosphorsexcitation peak were located in350nm, the emission peak were located in482nm and573nm. According to the principle of three colors, blue andyellow two kinds of color of light compound can produce white light.