摘要
Pr3＋ doped ZnO quantum dots （QDs） were successfully synthesized by sol-gel process. X-ray diffraction （XRD） and X-ray Phtoelectron spectroscopy （XPS） were used to analyze the microstructure variation of ZnO QDs and the chemical environment of Pr3＋ with increasing Pr3＋ doping concentrations. Most of Pr3＋ ions distribute on the surface ofZnO QDs while a few of them penetrate into the ZnO lattice to substitute Zn2＋ which causes the lattice distortion and the change of the crystal size. With increasing concentration of Pr3＋ ions, the crystal size of ZnO QDs firstly increases and then decreases meanwhile the amorphization gradually increases. New Pr-O-Zn bonds formed after Pr3＋ doping and Pr3＋ ions have at least two chemical bonding environments： one is Pr-O-Zn bond and the other is Pr-O bond surrounded by oxygen vacancies.
Pr3＋ doped ZnO quantum dots （QDs） were successfully synthesized by sol-gel process. X-ray diffraction （XRD） and X-ray Phtoelectron spectroscopy （XPS） were used to analyze the microstructure variation of ZnO QDs and the chemical environment of Pr3＋ with increasing Pr3＋ doping concentrations. Most of Pr3＋ ions distribute on the surface ofZnO QDs while a few of them penetrate into the ZnO lattice to substitute Zn2＋ which causes the lattice distortion and the change of the crystal size. With increasing concentration of Pr3＋ ions, the crystal size of ZnO QDs firstly increases and then decreases meanwhile the amorphization gradually increases. New Pr-O-Zn bonds formed after Pr3＋ doping and Pr3＋ ions have at least two chemical bonding environments： one is Pr-O-Zn bond and the other is Pr-O bond surrounded by oxygen vacancies.
基金
Funded by the Science and Technology Planning Project of Wuhan City(No.2013010501010135)
the Science and Technology Planning Project of Hubei Province(Nos.2013BAA095,2014BAA136)
National Natural Science Foundation of China(No.51372179)
