Co-Precipitation Preparation and Luminescent Behavior of (Y,Gd)BO3∶ Eu Phosphor

(Y,Gd)BO3∶ Eu phosphors were prepared by co-precipitation precursors, and luminescent properties were investigated. The precursors were synthesized by introducing hydroxyl ion to mixed solution of rare earth nitrates and boric acid, either through adding ammonia(precursor 1)or through controlled release of hydroxyl ion of urea(precursor 2). The precursors were fired in air at 1000 ℃ for 2 h. Resulted phosphor synthesized with precursor 1 has non-uniformed particle with mean diameter of about 3 μm, while that with precursor 2 exhibits uniformed near spherical-like morphology with mean diameter of about 300 nm. Phosphors with the two methods exhibit same crystal structure as that of commercial one. Emission spectra of the samples indicate that the sample prepared with precursor 2 shows relative higher intensity(exited by 172 nm VUV)than that prepared with the other precursor.     

CCFL荧光粉的现状及其发展趋势

简述了作为液晶显示背光源主流的冷阴极荧光灯(CCFL)的应用情况, 重点介绍了CCFL三基色荧光粉的现状及发展趋势. 商用CCFL红粉主要是Y2O3:Eu3 , 其次是YVO4:Eu3 ;绿粉、蓝粉主要是铝酸盐基质和磷酸盐基质两大体系. 对CCFL三基色荧光粉各体系的发光性能、应用特性和制备条件等进行了详细地对比分析.     

Co-Precipitation Preparation and Luminescent Behavior of （ Y, Gd） BO3 ： Eu Phosphor

(Y,Gd) BO3:Eu phosphors were prepared by co-precipitation precursors, and luminescent properties were investigated. The precursors were synthesized by introducing hydroxyl ion to mixed solution of rare earth hitrates and boric acid, either through adding ammonia( precursor 1 )or through controlled release of hydroxyl ion of urea( precursor 2). The precursors were fired in air at 1000℃ for 2 h. Resulted phosphor synthesized with precursor 1 has non-uniformed particle with mean diameter of about 3μm, while that with precursor 2 exhibits uniformed near spherical-like morphology with mean diameter of about 300 nm. Phosphors with the two methods exhibit same crystal structure as that of commercial one. Emission spectra of the samples indicate that the sample prepared with precursor 2 shows relative higher intensity( exited by 172 nm VUV)than that prepared with the other precursor.