Low-dose X-ray induced long afterglow NIR luminescence from Cr^(3+)doped Zn_(1-x)Cd_(x)Ga_(2)O_(4)spinel solid solutions  

作　　者：Tingting Zhao Wenzhi Sun Shuya Wang Wei Meng Chunqing Fu Xiaoyan Fu Hongwu Zhang 

机构地区：[1]School of Chemistry and Material Sciences,Ludong University,Yantai,264025,China [2]College of Materials Science and Engineering,Xiamen University of Technology,Xiamen,361024,China

出　　处：《Journal of Rare Earths》2025年第2期246-252,I0001,共8页稀土学报(英文版)

基　　金：Project supported by the State Key Research Project of Shandong Natural Science Foundation(ZR2020KB019);the fund of"Two-Hundred Talent"Plan of Yantai City;the National Natural Science Foundation of China(11974013);the Natural Science Foundation of Fujian Province(2022J011270)。

摘　　要：The low-dose X-ray induced long afterglow near infrared(NIR)luminescence from Cr^(3+)doped Zn_(1-x)Cd_(x)Ga_(2)O_(4)spinel solid solutions was investigated.The structure analysis shows the good formation of Zn_(1-x)Cd_(x)Ga_(2)O_(4)spinel solid solutions,which possesses a cubic spinel structure with Fd3m space group.The formation of Zn_(1-x)Cd_(x)Ga_(2)O_(4)spinel solid solutions induces the obvious increase of long afterglow near infrared luminescence excited by low-dose X-ray,When the content of doped Cd^(2+)reaches 0.1,the low-dose X-ray induced long afterglow NIR luminescence is the maximum.More importantly,only 5 s Xray irradiation can induce more than 6 h NIR afterglow emission,of which the afterglow luminescent intensity is still 5 times stronger than the background intensity after 6 h.The thermoluminescent results show that under the 5 s exposure of X-ray,the trap density of Zn_(0.9)Cd_(0.1)Ga_(2)O_(4):Cr^(3+)is much higher than that of ZnGa_(2)O_(4):Cr^(3+).The replacement of Cd^(2+)ions with large radius at Zn^(2+)sites causes the increase of de fects and dislocations,which results in the obvious increase of trap co ncentrations.And the addition of high-z number elements Cd^(2+)would enhance the X-ray absorption of the solid solutions,which thus can be easily excited by low-dose X-ray.Zn_(0.9)Cd_(0.1)Ga_(2)O_(4):1%Cr^(3+)solid solution is a potential candidate of lowdose X-ray induced long afterglow luminescent materials.

关 键 词：Zn_(1-x)Cd_(x)Ga_(2)O_(4):1%Cr^(3+) Phosphors Solid solutions X-ray induced long afterglow luminescence Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]