Ce^(3+)-Yb^(3+)共掺YAG荧光粉量子剪裁发光的浓度及温度特性  

Concentration and Temperature Characteristics of Quantum Cutting Luminescence in Ce^(3+)-Yb^(3+)Co-doped YAG Phosphor

作　　者：李路[1,2] 娄朝刚[1] 谢宇飞[1] 

机构地区：[1]东南大学电子科学与工程学院,江苏南京210096 [2]三江学院电子信息工程学院,江苏南京210012

出　　处：《发光学报》2016年第12期1445-1450,共6页Chinese Journal of Luminescence

基　　金：江苏省高校自然科学基金(14KJD510009);江苏省自然科学基金(BK2011033);江苏省博士后研究基金计划(1501042B);江苏高校品牌专业建设工程(PPZY2015A033)资助项目

摘　　要：采用高温固相法制备了不同掺杂浓度的YAG∶1%Ce^(3+),x%Yb^(3+)(x=5,10,15,20,25)系列荧光粉。在450 nm蓝光激发下,测试了样品的发射光谱,得到了中心波长在550 nm的可见宽带发射(Ce^(3+):5d→4f)和1 030 nm的近红外发射(Yb^(3+):2F_(5/2)→2F_(7/2))。可见和近红外发射强度随Yb^(3+)掺杂浓度的变化表明Ce^(3+)到Yb^(3+)存在能量传递过程,并得到Yb^(3+)的猝灭浓度为15%。在低温条件下(80~300 K)测试YAG∶1%Ce^(3+),15%Yb^(3+)样品的发射光谱和拉曼光谱,通过对其量子剪裁发光温度特性的分析,描述了基质声子在Ce^(3+)到Yb^(3+)的能量传递过程中起到的重要作用。YAG∶ 1% Ce^（3＋）,x% Yb^（3＋）（ x = 5,10,15,20,25） phosphor was synthesized via the high temperature solid state method. The optical properties of the phosphor were characterized by photoluminescence（ PL）. Under the excitation of 450 nm,the visible broadband emission from Ce^（3＋）： 5d→4f with the central wavelength of 550 nm was observed. The NIR emission around 1 030 nm from Yb^（3＋）：2F_（5 /2）→2F_（7 /2）was also observed under the same excitation. The variation of emission intensity with the concentration of Yb^（3＋）shows that the energy transfer exists between Ce^（3＋）and Yb^（3＋）,and the quenching concentration of Yb^（3＋）is 15%. For YAG ∶ 1% Ce^（3＋）,15% Yb^（3＋）sample,the emission spectra and Raman spectra were measured at low temperature（ 80-300 K）. Based on the analyze of temperature characteristics of quantum cutting luminescence,the results show that the phonons of the host material play an important role in the energy transfer from Ce^（3＋）to Yb^（3＋）.

关 键 词：量子剪裁 猝灭浓度 温度特性 能量传递 

分 类 号：O482.31[理学—固体物理]