H_3BO_3对Y_(1.98)O_3:Eu_(0.01),Dy_(0.01)红色长余辉发光材料结构和余辉性能的影响  

Effect of H_3BO_3 on structure and long persistence properties of Y_(1.98)O_3:Eu,Dy red long-afterglow phosphor

作　　者：谢伟[1] 王银海[2] 全军[1] 邹长伟[1] 梁枫[1] 邵乐喜[1] 

机构地区：[1]湛江师范学院化学与材料研究中心,湛江524048 [2]广东工业大学物理与光电工程学院,广州510006

出　　处：《物理学报》2014年第1期255-261,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:21271048;11304276);广东省教育厅高校优秀青年创新人才培育项目(批准号:LYM11089)资助的课题~~

摘　　要：采用高温固相法制备了发光样品Y1.98O3:Eu3+0.01,Dy3+0.01.采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、荧光光谱仪、单光子计数器测试了不同含量的H3BO3对Y1.98O3:Eu3+0.01,Dy3+0.01物相结构、颗粒形貌、发光性能、余辉性能的影响.结果表明当H3BO3含量低于8%(mol)时,样品可保持Y2O3晶格结构,且样品颗粒随H3BO3的含量增加逐渐增大.样品光致发光由Eu3+离子电子的5D0→7FJ跃迁所致,主峰位于612 nm,且发光强度随H3BO3含量的增加呈线性增强.随着H3BO3含量的增加,样品余辉衰减时间逐渐增加,热释光谱分析表明H3BO3的加入增加了基质陷阱能级的深度与浓度,故而导致样品长余辉性能的变化.The phosphor Y1.98 O3：Eu^3＋ 0.01,Dy3＋ 0.01 was prepared by high temperature solid reaction method.X-ray powder difraction（XRD）,scanning electronic microscope（SEM）,photoluminescence spectra（PL）,and single-photon counter system were used to investigate the structure,morphology,luminescent properties,and decay characteristics of the phosphor Y1.98 O3：Eu^3＋ 0.01,Dy3＋ 0.01 which was synthesized with diferent contents of H3 BO3.Results show that the structure of the H3 BO3-contained phosphors can keep Y2 O3 matrix when the content of H3 BO3 is below 8%（mol）,and the particles size of phosphors increases during the addition of H3 BO3.The luminescence of phosphors come from the transition of5D0 →7FJ of Eu^3＋,the main emission peaks at 612 nm and the intensity is increased linearly with the increase of H3 BO3 content.Phosphors show better afterglow characteristics during the increase of H3 BO3.The measurement of thermoluminescence（TL） reveals that the addition of H3 BO3 increases the trap depth and trap concentration in the host,hence the afterglow characteristics become better.

关 键 词：硼酸 长余辉 氧化钇 陷阱能级 

分 类 号：TN104.3[电子电信—物理电子学]