GdPO4∶Tb3+荧光粉的制备及发光性能研究
Preparation and Luminescent Properties of GdPO4∶Tb3+Phosphors
孟晓燕 1廖云 1张丽蓉 1张雨蒙 1吴丽丹 1杨流赛1
作者信息
- 1. 上饶师范学院化学与环境科学学院,上饶 334001
- 折叠
摘要
稀土Tb3+掺杂磷酸钆(GdPO4)绿色荧光粉是实现白光LED的潜在荧光粉,其常规水热法的制备存在反应时间较长、Tb3+的掺杂量偏低等问题.本文采用水热法结合高温烧结制备了一系列Gd1-xPO4∶xTb3+(x=0、1％、5％、11％、13％、15％、17％、19％)样品,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)-能谱仪(EDS)、红外光谱仪(FT-IR)和荧光分光光度计对所得样品的相结构、形貌、元素组成、光学吸收和发光性能进行了表征.研究结果表明,所合成样品均为GdPO4的纯相,属于单斜晶系独居石结构,且Tb3+均匀分布在GdPO4基质中引起晶格收缩.在274 nm的光激发下,GdPO4∶Tb3+荧光粉的最强发射峰位于545 nm处,属于Tb3+的5D4→7F5跃迁,且其荧光猝灭摩尔分数高达15％,此样品(GdPO4∶15％Tb3+)表现出优异的绿光发射和良好的热稳定性.
Abstract
Rare earth Tb3+doped gadolinium phosphate(GdPO4)green phosphor is a potential phosphor for white LED,while the preparation by conventional hydrothermal method has some problems,such as long reaction time and low doping amount of Tb3+.A series of Gd1-r PO4∶xTb3+(x=0,1％,5％,11％,13％,15％,17％,19％)samples were prepared by hydrothermal method combined with high temperature sintering.The phase structure,morphology,elemental composition,optical absorption and luminescence properties of samples were characterized by X-ray diffractometer(XRD),scanning electron microscope(SEM)-energy spectrometer(EDS),infrared spectrometer(FT-IR)and fluorescence spectrophotometer.The results show that,all the synthesized samples are pure phase of GdPO4 belonging to monoclinic monazite structure,and the Tb3+are uniformly distributed in GdPO4 matrix and cause lattice shrinkage.Under 274 nm photoexcitation,GdPO4∶Tb3+phosphors have the strongest emission peak at 545 nm,which belongs to 5 D4 →7 F5 transition of Tb3+.The fluorescence quenching concentration of Tb3+was determined to be 15％(molar ratio),and this sample(GdPO4∶15％Tb3+)exhibits excellent green light emission and good thermal stability.
关键词
磷酸钆/Tb3+掺杂/水热法/高温烧结/发光性能/绿色荧光粉Key words
gadolinium phosphate/Tb3+doping/hydrothermal method/high temperature sintering/luminescent property/green phosphor引用本文复制引用
基金项目
江西省教育厅科技项目(GJJ211714)
江西省自然科学基金(20212BAB213029)
上饶市科技厅项目(2022YF022)
出版年
2024
国家科技期刊平台
NSTL
万方数据