Large-scale synthesis of ZnO microhollowspheres and their optical properties |
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| Institution: | 1. Solar Energy Research Institute, Yunnan Normal University, Kunming, Yunnan 650092, PR China;2. College of Science & Engineering, James Cook University, Townsville, QLD 4811, Australia;3. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia |
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| Abstract: | ZnO microhollowspheres (MHs) were synthesized by evaporation of a mixture of zinc, graphite, and zinc oxide powders. The microstructures of the resultant MHs have been characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), X-ray diffraction, and photoluminescence (PL). The PL results indicated that the green emission peak at 510 nm of the MHs was higher and broader than that of the nanocombs, which was due to oxygen vacancies formed in the MHs. In addition, the mechanism of ZnO MHs was discussed in detail. |
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