Hydrothermal synthesis and luminescence of SrAl2O4:Eu2+/Yb3+ hierarchical nanostructures
SrAl2O4:Eu2+/Yb3+ powders were synthesized through the hydrothermal process. The phase and morphology of powders were characterized by XRD and SEM. The corresponding luminescence was recorded by the spectrophotometer. The XRD results indicated that the obtained SrAl2O4:Eu2+/Yb3+ samples have the monoclinic phase. The SEM images showed that the obtained SrAl2O4:Eu2+/Yb3+ samples are microspheres with hierarchical structure. Under the excitation at 360 nm, the SrAl2O4:Eu2+/Yb3+ powders showed emission bands in visible and near infrared regions. The Yb3+ concentration has obvious influence on the emission intensities of SrAl2O4:Eu2+/Yb3+ powders. The results showed that Eu2+ ion is an efficient sensitizer for Yb2+ ion in SrAl2O4 host lattice.
KeywordsMonoclinic Phase Energy Transfer Process SrAl2O4 Yb2O3 Charge Transfer State
This work was financially supported by the National Natural Science Foundation of China (11204021) and Natural Science Foundation of Jilin Province (20130522008JH).
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