Tunable luminescence in co-doped Zn3Al2Ge2O10:Cr3+by controlling crystal field splitting and nephelauxetic effect  

作　　者：Qiongyu Bai Suling Zhao Zheng Xu Panlai Li 

机构地区：[1]Key Laboratory of Luminescence and Optical Information(Beijing Jiaotong University),Ministry of Education,Beijing 100044,China [2]Institute of Optoelectronics Technology,Beijing Jiaotong University,Beijing 100044,China [3]College of Physics Science&Technology,Hebei Key Lab of Optic-Electronic Information and Materials,Hebei University,Baoding 071002,China

出　　处：《Journal of Rare Earths》2020年第12期1265-1272,共8页稀土学报（英文版）

基　　金：Projects supported by the National Natural Science Foundation of China(61575019,11474018,61775013),China;The authors express the thanks to the Fundamental ResearchFunds for the Central Universities under Grant No. 2018YJS166,China and the Fundamental Research Funds for the Central Universitieswith the Grant No. 2016JBM066,No. 2017RC015, No.2017JBZ105, China.

摘　　要：Ce3+/Dy3+/Tb3+/Eu3+/Mn2+and Cr3+ions co-doped Zn3 Al2 Ge2 O10 phosphor were prepared by a hightemperature solid-state method.X-ray diffraction patterns prove the cubic phase structure of prepared Zn3 Al2 Ge2 O10 phosphor,Emission,excitation spectra and decay curves confirm the tunable luminescence.Different degrees of the decrease of emission FWHM in Zn3 Al2 Ge2 O10:0.02 Cr3+,RE(RE=Ce3+,Dy3+,Tb3+,Eu3+)and Zn3 Al2 Ge2 O10:0.02 Cr3+,Mn2+are observed.The reason of variable FWHM is the effect of crystal field splitting and nephelauxetic effect,and the nephelauxetic effect is dominant.Therefore,the emission FWHM decreases with the increasing concentration of Mn2+/Tb3+/Eu3+in Zn3 Al2 Ge2 O10:0.02 Cr3+,and for Zn3 Al2 Ge2 O10:0.02 Cr3+,Ce3+and Zn3 Al2 Ge2 O10:0.02 Cr3+,Dy3+,it is a constant.The variation of Zn3 Al2 Ge2 O10:0.02 Cr3+,Tb3+is more obvious than that of Zn3 Al2 Ge2 O10:0.02 Cr3+,Eu3+,because Tb3+ion has smaller electronegativity.Thus,the tunable luminescence of Cr3+can be realized by co-doping different ions.And these phosphors have potential applications in light-emitting diodes for plant growth.

关 键 词：Iuminescence Zn3Al2Ge2O10:Cr3+ CO-DOPING IONS Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]