期刊
MATERIALS RESEARCH EXPRESS
卷 1, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/1/4/045024
关键词
ZnO nanoflowers; nanostructures; luminescence; defects
资金
- Talent Plan at Anhui University of Technology [000997]
A large amount of ZnO nanoflowers were fabricated on graphene/SiO2/Si substrate by the hydrothermal method. The ZnO nanoflowers were characterized by x-ray diffraction, scanning electron microscopy, energy dispersive x-ray spectrometry, photoluminescence and UV-visible spectrometry. The ZnO nanoflowers were of pure wurtzite phase with good crystalline quality. The shape of the ZnO nanoflowers showed a star-like morphology. Green and orange luminescences in the photoluminescence spectrum were attributed to O vacancies and O interstitials, respectively. Compared with ZnO powder, ZnO nanoflowers exhibited a smaller optical band gap, for which the O vacancy was responsible.
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