Vacancy filling effect of graphene on photoluminescence behavior of ZnO/graphene nanocomposite |
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| Authors: | Eunsil Lee Jong‐Young Kim Bob Jin Kwon Eue‐Soon Jang Sung Jin An |
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| Institution: | 1. Icheon Branch, Korea Institute of Ceramic Engineering and Technology, , 467‐843 Gyeonggi‐do, Korea;2. Department of Chemistry, University of Illinois at Chicago, , Chicago, USA;3. Department of Applied Chemistry, Kumoh National Institute of Technology, , Gumi 730‐701, Korea;4. Department of Materials Science and Engineering, Kumoh National Institute of Technology, , Gumi 730‐701, Korea |
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| Abstract: | We report on the aerosol synthesis and optical characterization of ZnO/unoxidized graphene (UG) platelets nanocomposite films with high optical transparency (>85% at visible wavelengths). The ZnO/UG composite films, in which UG nanoplatelets are embedded in nano‐grained ZnO, were fabricated from colloidal suspensions of UG platelets with an aqueous zinc precursor. From photoluminescence (PL) spectra of the UG composite films, it was found that PL intensity decreases with the addition of UG platelets. The features of PL intensity in the UG composites are in contrast to that of ZnO/graphene oxide (G‐O) platelets composites, and can be explained by the absence of an oxygen vacancy filling effect, due to the unoxidized nature of UG and an increase in defect sites in its composites. (© 2014 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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| Keywords: | graphene oxide graphene ZnO photoluminescence optoelectronic properties |
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