Study Of Rare Earth Ions Doped Long Luminescence Glass

Long-lasting phosphorescence material have a great effect on the development of science and technology applied to information process, new energy, life sciences and astro-spaceflight as a new type of optical electric material or component. Glass is a good carrier of long-lasting phosphorescence material due to the character of the uniform, transparence and easy molding.At present the luminescence mechanism of long-lasting phosphorescence are used for reference of theory of light-prompting material and heat-prompting-light material. There has not formed a consistent conclusion about the luminescence mechanism of long-lasting phosphorescence due to the complexity of the glass structure and the lack of direct research measure. So there only have some models of the theory include cavity transfer, oxygen cavity and location coordinate.The glass system is silicate; borate and borate-silicate glass in which rare icon are intermingled. The different system glass that is uniform and transparent was made by high melting and clarifying temperature. After annealing the glass samples were cut tow parts, one part was deoxidized and crystallized, it has the character of afterglow but the other which produced in the atmosphere had not the character by spectrum analysis. The afterglow of glass is due to the characteristic emission of Eu²⁺ icon, after deoxidization the Eu³⁺ are converted into Eu²⁺. The excitation spectrum of the sample shows a brand peaking at about 485nm which is due to the d-f transition of divalent europium. There is also a peaking at about 577nm that is the characteristic peak of prevalence europium. In order to get higher performance long-lasting luminescence glass, we should convert more Eu³⁺ into Eu²⁺ as it could be by means of introducing reducer agent directly in glass or improving producing mechanics of glass.