Ce^3+共掺杂BaZn1.06Al9.94O17:Tb^3+荧光粉的发光性质及其能量传递机理  

Luminescence properties and energy transfer mechanism of Ce^3+co-doped BaZn1.06Al9.94O17:Tb^3+phosphor

作　　者：宁航 田莲花 NING Hang;TIAN Lianhua(College of Science,Yanbian University,Yanji 133002,China)

机构地区：[1]延边大学理学院,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2020年第4期321-325,共5页Journal of Yanbian University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51362028);吉林省科技发展计划项目(20130101035JC);吉林省教育厅“十三五”科学技术项目(JJKH20180893KJ)。

摘　　要：采用高温固相法合成了BaZn1.06Al9.94O17:Tb^3+,Ce^3+荧光粉,并对其发光性能和能量传递机理进行了研究.研究结果表明:由于Tb%3+离子的4f^8→4f^75d^1跃迁,使得BaZn1.06Al9.94O17:Tb^3+的激发带中心位于230 nm处.共掺杂Ce^3+离子后,BaZn1.06Al9.94O17:Tb^3+的激发光谱出现了明显的红移,在240~320 nm范围内的宽带激发归因于Ce^3+离子的4f→5d跃迁.由于Ce^3+与Tb^3+离子发生了能量传递,使得BaZn1.06Al9.94O17:Tb^3+,Ce^3+中Tb^3+离子的5D4→7FJ(J=6、5、4和3)发射峰的发光强度比未掺杂Ce^3+离子时提高了约15倍.因此,制备的BaZn1.06Al9.94O17:Tb^3+,Ce^3+荧光粉可望在照明、显示器件等应用中具有良好的应用价值.BaZn1.06Al9.94O17:Tb^3+,Ce^3+phosphor was synthesized by high temperature solid state reaction,and the luminescent properties and energy transfer mechanism from Ce 3+to Tb 3+were investigated in this paper.The research results show that the absorption band of BaZn1.06Al9.94O17:Tb^3+was centered at 230 nm due to the 4f^8→4f^75d^1 transition of Tb^3+ions.With co-doped Ce^3+ions into BaZn 1.06Al9.94O17:Tb 3+phosphor,the excitation band showed obviously red shift.The wide-band absorption in the range of 240-320 nm was attributed to the 4f→5d transition of Ce^3+ions.Compared with Ce^3+ion free BaZn 1.06Al9.94O17:Tb^3+,the emission intensity was increased about 15 times due to the energy transfer from Ce^3+to Tb^3+.So BaZn1.06Al9.94O17:Tb^3+,Ce^3+could be a valuable phosphor for lamp or display applications.

关 键 词：高温固相法 荧光粉 Ce^3+离子 发光性能 

分 类 号：O482.31[理学—固体物理]