高热稳定性的SrAl2Si2O8∶Eu^2+荧光粉的制备与发光性能研究  

Preparation and Luminescent Properties of SrAl2Si2O8∶Eu^2+Phosphor with High Thermal Stability

作　　者：唐庆 陈尧 颜晓东 左芬[1,2] 程菊 TANG Qing;CHEN Yao;YAN Xiaodong;ZUO Fen;CHENG Ju(Huaiyin Normal University,Huaian 223300,China;Jiangsu Key Construction Laboratory of Modern Measurement Technology and IntelligentSystem,Huaian 223300,China)

机构地区：[1]淮阴师范学院,淮安223300 [2]江苏省现代检测技术与智能系统重点建设实验室,淮安223300

出　　处：《人工晶体学报》2020年第9期1625-1630,共6页Journal of Synthetic Crystals

基　　金：江苏省高等学校自然科学研究基金(18KJB140002);江苏省高等学校大学生创新创业训练计划(201910323033Y)。

摘　　要：采用高温固相法制备了SrAl2Si2O8∶Eu^2+(SASO∶Eu^2+)系列荧光粉,详细研究了荧光粉的晶体结构、激发光谱、发射光谱以及热稳定性。结果表明,在337 nm激发下,发射光谱为一个非对称的宽带单峰,峰值波长404 nm,峰的半高宽约为53 nm,Eu^2+的最佳掺杂摩尔浓度为5%,根据Dexter理论,讨论了SASO∶Eu^2+荧光粉浓度猝灭是由于Eu 2+电偶极-电偶极之间的相互作用引起的。当加热到225℃时,SASO∶0.05Eu^2+荧光粉发光强度仍具有在初始室温下发光强度的97.4%,表明其具有优异的热稳定性。SrAl 2 Si 2 O 8∶Eu 2+(SASO∶Eu 2+)series phosphors were prepared by high temperature solid-state method.The crystal structure,excitation spectrum,emission spectrum and thermal stability of phosphors were studied in detail.The results show that under 337 nm excitation,the emission spectrum is an asymmetric broadband single peak with a peak wavelength of 404 nm,a peak half-height width of about 53 nm,and the optimal doping molar concentration of Eu 2+is 5%.According to Dexter theory,it is discussed that the quenching of SASO∶Eu 2+phosphor concentration is caused by the interaction between Eu 2+electric dipole to dipole.When heated to 225℃,the intensity of SASO∶0.05Eu 2+phosphor still has 97.4%of the intensity at the initial room temperature,indicating that it has excellent thermal stability.

关 键 词：SrAl2Si2O8∶Eu^2+荧光粉 高温固相法 发光性能 热稳定性 

分 类 号：O482.31[理学—固体物理]