摘要
采用高温固相法与溶胶凝胶法分别合成了不同Ti含量的Baghdadite矿物发光材料Ca3(Zr,Ti)Si2O9。相对于传统的高温固相法,溶胶凝胶法合成Ca3(Zr,Ti)Si2O9的成相温度更低,且合成产物的粒径更小且均一。荧光光谱分析表明,不同Ti含量的Ca3(Zr,Ti)Si2O9均可被254nm紫外光激发,产生明显的黄绿色发射光,荧光发射光谱呈现出发射中心在531nm的宽带发射特征。进一步的研究还发现:在Baghdadite矿物Ca3(Zr,Ti)Si2O9基质中,掺杂稀土离子Sm3+,Eu3+及Dy3+均可产生相应的稀土离子跃迁特征发射,这些发射线与Ca3(Zr,Ti)Si2O9基质材料的本征发射光复合,其光谱覆盖范围在整个可见光区(400～700nm),由此表明Ca3(Zr,Ti)Si2O9可作为一类新型的单一基质白光发射材料体系。
Synthetic baghdadite mineral luminescence materials Ca3（Zr,Ti）Si2O9 with different Ti content were prepared by the traditional solid-state method and Sol-Gel method,respectively.Baghdadite mineral luminescence materials prepared by the Sol-Gel method have low synthesis temperature,small and uniform phosphor particles compared with that of the samples obtained by the solid-state method.It is found that Ca3（Zr,Ti）Si2O9 with different Ti contents all exhibit greenish yellow light with peak wavelength at 531 nm by 254 nm ultraviolet.Further optical properties investigations on the rare earth doping luminescence effect of Ca3（Zr0.90,Ti0.10）Si2O9 materials were studied by introducing different rare earth ions,including Sm3＋,Eu3＋ and Dy3＋.They all show the characteristic emission in the whole visible light region（400~700 nm）,indicating that they are promising as the single-phase light-conversion phosphors for white LEDs.
出处
《激光与光电子学进展》
CSCD
北大核心
2010年第10期97-102,共6页
Laser & Optoelectronics Progress
基金
教育部博士点新教师基金(20090022120002)
中国地质大学(北京)大学生创新实验计划资助课题
