Enhanced green fluorescence and afterglow in (Zn, Mg)_2GeO_4: Mn^(2+), Cd^(2+)  

作　　者：Yan Cong YangYang He DaPeng Dong LiMei Wang Zhen Zhang ZiWen Wang Bin Dong 

机构地区：[1]School of Physics & Materials Engineering, Dalian Nationalities University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2017年第9期76-79,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.21301023,11204024,and 11474046);Program for New Century Excellent Talents in University(Grant No.NCET-13-0702);Science and Technology Project of Liaoning Province(Grant No.2012222009);Natural Science Foundation of Liaoning Province(Grant No.20170540200);Fundamental Research Funds for the Central Universities(Grant Nos.DC201502080302,DC201502080406,DC201502080203,DCPY2016009,and DCPY2016026);Technology Foundation for Selected Overseas Chinese Scholar,Ministry of Human Resources and Social Security of the People’s Republic of China

摘　　要：Long-lasting phosphorescent （LLP） materials have attracted considerable attention since green and blue emitting persis- tent Eu2＋ doped alkaline earth phosphors were reported in the mid-1990s [1-3]. Over the past few decades, a consid- erable effort has been made to design novel LLP materials for a wide range of applications such as emergency lighting, interior decoration, road signs, and in vivo bioimaging [4-6]. For these applications, long persistence times are often desir- able. Two types of active center involved are： emitters and traps in LLP phosphors. Emitters are capable of emitting ra- diation after being excited, and their color is determined by the emission wavelength of the LLP phosphor. Traps states usually do not emit radiation, but store the excitation energy later releasing it to the emitters under thermal disturbance. Thus, traps play an important role in photo-energy storage of LLP phosphors. The trap type and trap distribution are gen- erally associated with lattice defects and/or co-dopants. The overall nature of the trap states determines the persistence in- tensity and time. Thus, design of LLP phosphors focuses on generating suitable trap levels and trap densities.Long-lasting phosphorescent(LLP)materials have attracted considerable attention since green and blue emitting persistent Eu^(2+) doped alkaline earth phosphors were reported in the mid-1990s[1-3].Over the past few decades,a considerable effort has been made to design novel LLP materials for a wide range of applications such as emergency lighting,interior decoration,road signs,and in vivo bioimaging[4-6].For these applications,long persistence times are often desirable.Two types of active center involved are:emitters

关 键 词：长余辉发光材料 绿色荧光 增强型 陷阱分布 ZN 材料设计 光致发光材料 余辉时间 

分 类 号：O482.3[理学—固体物理]