Study On The Synthesis And Properties Of Silicate Phosphors Doped In Rare Earth

White light emitting diodes(LED)possesses such excellent performance as low-powerconsumption, long lifetime, environmental protection and fast response time, and so on. It is notonly best for sustainable development of the society and environment, but also can promote thedevelopment of LED industry and other related industries, improving competitiveness of lightingindustry in our country. With the development and application of the commercial YAG phosphor,people committed to developing a variety of rare earth doped phosphor matrix. Silicate phosphorhas good chemical stability, thermal stability and low cost, so people have focused a lot ofattention on the research and development of silicate phosphor matrix for o long time. From nowon, a series of new silicate phosphor had been developed, which can be excited by kinds of LEDchips.The main contents of this paper include these followings:1: A series of silicate phosphor matrix SrSiO3:Eu²⁺ had been synthesized by traditional hightemperature solid-phase sintering under the three different experimental conditions. Not only canobtain the white light phosphor excited by UV light, We can also get the yellow-green materialsunder near-blue excitation. In addition, the best sintering condition can be find through a series ofcomparative tests and doped with alkali metal cations.2: In this section, We first synthesized silicate phosphor Ca₄Y₆O(SiO₄)6:Eu²⁺(Ce³⁺) bytraditional high temperature solid state sintering and obtain the best doping concentrationaccording to the comparative tests. Then for the structure of Ca₄Y₆O(SiO₄)6:Eu²⁺, the much betteroutcome can be get through the doped with alkali metal cations(Ba²⁺,Sr²⁺) . Finally, We try to usethe sol-gel methods to synthesis the phase of Ca₄Y₆O(SiO₄)6:Eu²⁺ and get the relatively lowsynthesis temperature. All the result shown the phosphor can be excited by near UV InGaN chipsaround 300-420nm, The emission band is due to the 4f65d1→4f7 transition of the Eu²⁺. 3: In addition We also obtain others phosphor such as Ca₂SiO₄:Ce³⁺, BaSiO₄:Eu²⁺(Ce³⁺), andtake attention on their luminescence properties.