Structural and optical properties of cobalt doped ZnO nanocrystals |
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| Authors: | Meihui Li Jianping Xu Ximing Chen Xiaosong Zhang Yanyu Wu Ping Li Xiping Niu Chengyuan Luo Lan Li |
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| Affiliation: | 1. Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China;2. Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Electronics Information Engineering, Tianjin University of Technology, Tianjin 300384, China;3. Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | Zn1−xCoxO nanocrystals with nominal Co doping concentrations of x = 0–0.1 were synthesized through a simple solution route followed by a calcining process. The doping effects on the structural, morphological and optical properties were investigated by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman, absorption and luminescence spectroscopy. The results indicated that a small amount of Co ions were incorporated into ZnO lattice structure, whereas the secondary phase of Co3O4 was segregated and precipitated at high Co doping concentrations, the solid solubility of Co ions in ZnO nanocrystals could be lower than 0.05. The spectra related to transitions within the tetrahedral Co2+ ions in the ZnO host crystal were observed in absorption and luminescence spectra. |
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| Keywords: | ZnO nanocrystal Co doping Optical property |
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