Abstract
La-doped ZnO nanoparticles were synthesized via a facile and surfactant-free chemical precipitation route, and the effects of lanthanum doping concentration on the structures, morphologies and photoluminescence properties were investigated by XRD, TEM, EDX, PL and UV–Vis absorption spectra. The results showed that the La3+ ions were successfully incorporated into the ZnO host, and the products were well-crystalline. The average size and band gap of La-doped ZnO nanoparticles were varied with the lanthanum doping concentration. The average size of doped nanoparticles was much smaller as compared to that of undoped ZnO. The increasing of lanthanum doping concentration increased the defects in ZnO and resulted in a red shift of UV emission, indicating the narrow band gap in doped nanoparticles. This was probably attributed to the impurity energy levels in band gap introduced by substitutional La3+ ions.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (Grant Nos. 51608226, 11204104, 11254001, 61378085, 21576111), National Programs for High Technology Research and Development of China (863) (Item No. 2013AA032202), Program for New Century Excellent Talents in University (Item No. NCET-13-0824), Program for the development of Science and Technology of Jilin Province (Item No. 20140101205JC) and Program for the development of Science and Technology of Siping City (Item No. 2015065).
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Lang, J., Fang, Y., Zhang, Q. et al. Synthesis, characterization and photoluminescence property of La-doped ZnO nanoparticles. Appl. Phys. A 122, 873 (2016). https://doi.org/10.1007/s00339-016-0408-x
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DOI: https://doi.org/10.1007/s00339-016-0408-x