WU Chun-xia, ZHANG Shuang-ge, HE Zi-juan etc. Enhanced Ultraviolet Photoluminescence of Graphene-ZnO Nanocomposites[J]. Chinese Journal of Luminescence, 2014,35(6): 701-705
WU Chun-xia, ZHANG Shuang-ge, HE Zi-juan etc. Enhanced Ultraviolet Photoluminescence of Graphene-ZnO Nanocomposites[J]. Chinese Journal of Luminescence, 2014,35(6): 701-705 DOI: 10.3788/fgxb20143506.0701.
Enhanced Ultraviolet Photoluminescence of Graphene-ZnO Nanocomposites
Graphene-ZnO nanocomposites and pure ZnO samples were prepared by solvothermal method under the same conditions. The morphology and structure of nanocomposites were characterized by SEM
TEM
Raman and infrared spectroscopy. The results show that ZnO nanoparticles have dispersed on a few layers graphene. Compared with the morphology of graphene-ZnO nanocomposites
it is found that pure ZnO can grow into a preferred orientation of hexagonal structure
while ZnO aggregates into sphere in the presence of graphene which is attributed to the graphene hindered the preferred orientation of ZnO growth. From the PL spectra
the ultraviolet emission peak intensity of graphene-ZnO is stronger than that of pure ZnO
and accompanied by blue shift phenomenon. The difference of ultraviolet photoluminescence between ZnO and graphene-ZnO comes from the difference of morphology and the plasma effect of grapheme
while the plasma effect of graphene plays a key role.
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references
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