多功能硅酸铋晶体的生长与掺杂  

Growth and doping of BSO crystals for scintillation,laser and LED applications

作　　者：徐家跃 张彦 田甜 陈媛芝 申慧 肖学峰[2] 熊正烨 李永攀 马云峰 XU Jiayue;ZHANG Yan;TIAN Tian;CHEN Yuanzhi;SHEN Hui;XIAO Xuefeng;XIONG Zhengye;LI Yongpan;MA Yunfeng(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;College of Electric and Information Engineering,North Minzu University,Yinchuan 750021,China;School of Electronics and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,Guangdong,China)

机构地区：[1]上海应用技术大学材料科学与工程学院,上海201418 [2]北方民族大学电气信息工程学院,银川750021 [3]广东海洋大学电子与信息工程学院,广东湛江524088

出　　处：《应用技术学报》2024年第1期22-34,共13页Journal of Technology

基　　金：国家自然科学基金项目(51572175,61965001);973前期专项(2011CB612310);上海市优秀学科带头人项目(10520501200)资助。

摘　　要：硅酸铋(Bi_(4)Si_(3)O_(12),BSO)晶体是重要的闪烁材料,具有较快的衰减时间、适中的熔点和密度、原料成本低等优势。掺杂不仅能够提高BSO晶体闪烁性能,还可以使其成为多功能材料,比如荧光晶体、激光晶体。总结了BSO晶体的主要研究进展,采用坩埚下降法成功生长了大尺寸BSO晶体,浓度3%以上的稀土掺杂能有效抑制组分偏析;稀土掺杂BSO晶体是导热性能良好的荧光发光材料,紫外光激发下Dy掺杂BSO晶体发黄光,Dy/Tm共掺BSO晶体可实现白光LED发光;研究了Yb、Er、Ho、Tm等稀土掺杂BSO晶体的光谱特性,在Ho:BSO、Tm:BSO晶体中分别实现了0.73 W、0.65 W的激光输出;纯BSO晶体是以Bi3+为发光中心的闪烁晶体,微量Dy掺杂可使BSO晶体光输出提高50%,1%Ta掺杂也能显著提高光输出;BGSO混晶也具有闪烁、激光等发光性能,通过调节组分可以开发出梯度闪烁晶体,稀土掺杂BGSO还可能成为激光晶体。Bismuth silicate(Bi_(4)Si_(3)O_(12),BSO)single crystal is an important scintillator with the advantages of faster decay time,suitable melting point and density,low cost of raw materials.Doping is the way to improve scintillation properties of BSO crystal.Furthermore,doping makes it to be a multi-functional material,such as phosphor and laser crystal.In this review,we summarized the progress of BSO crystal in our lab.Large size BSO crystal has been grown by the modified Bridgman method,and it was found that the compositional segregation can be eliminated by doping more than 3%rare earth.Rare earth doped BSO crystals are phosphors with good thermal conductivity for high power LED applications.Dy:BSO emits yellow light and Dy/Tm:BSO emits white light.The spectroscopic characteristics of BSO crystals doped with Yb,Er,Ho and Tm have been investigated.The laser outputs of 0.73 and 0.65 W were realized in Ho:BSO and Tm:BSO crystals,respectively.BSO crystal emits light with the luminescence center of Bi3+exited by Xray orγ-ray.It was found that the light output of BSO crystals can be improved remarkable by doping small amount of Dy2O3 or about 1%Ta2O5.The mixed crystals of BSO and BGO,i.e.,BGSO,are novel scintillation and laser materials and Re-doped BGSO crystals are expected to be potential laser materials.

关 键 词：硅酸铋 晶体生长 闪烁体 荧光体 激光 

分 类 号：O78[理学—晶体学]