Synthesis And Luminescent Properties Of Rare Earth Doped YAB Green Phosphor

Boron aluminate light-emitting materials combine both borate and aluminate luminescent material advantages, and in the structure contains large amounts of boron oxide and aluminum oxygen groups, so that they have strong absorption in the VUV region, therefore they are expected to become the new generation of PDP phosphors. High temperature solid state method is a traditional method to prepare YAB: Tb³⁺ phosphor, but this method requires a higher temperature and longer reaction time, and the ball milling process on the sample may influence the luminous efficiency in some extent, thereby improving preparation process or to seek new ways to improve the preparation of luminescent properties of phosphors have some significance. In this paper, the green phosphor was prepared by means of chemical co-precipitation method, which were based on YAl₃(BO₃)₄, sensitized by Ce³⁺, activated by Tb³⁺, and the structure of the prepared powders, morphology, crystallization and fluorescence performance were analyzed.In order to obtain a higher luminous efficiency YAB: Ce³⁺, Tb³⁺ phosphor, the luminescence intensity impacted by the concentration of Tb³⁺ was explored in this paper, and the Tb³⁺ ions characteristic emission peak of strength impacte by the Ce³⁺ ion doped was also studied, and the energy transfer Mechanism was analysised, followed YAB: Ce³⁺, Tb³⁺ phosphor preparation conditions were studied by ion concentration, precipitant concentration, boric acid content and temperature as precipitation parameters, and finally the calcination conditions impact on the luminescence intensity of phosphor through the heat treatment were studied.The experimental results indicate that: in YAl₃(BO₃)₄, rare earth ions Ce³⁺ and Tb³⁺ doping concentration is 30% and 10%, the luminous intensity strongest, Ceâ†'Tb exists the effective energy transfer; under synthesis conditions of solution concentration is 0.4 mol/L, precipitation agent concentration is 4mol/L, B content is 125% and temperature water-bath is 25℃, phosphor luminous intensity strongest; under the 1,100℃and high temperature sintering for 2h, the fluorescence intensity of samples is best.