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- W2079935675 abstract "We report observation of both free and defect-mediated excitonic emissions from temperature-dependent PL study on ZnO/graphene oxide (G-O) nanocomposite grown by ultrasonic assisted spray pyrolysis (UASP). From the temperature-dependent photoluminescence (PL) spectra of the ZnO/G-O nanocomposite, new graphene-related peak was observed at 372 nm along with the exciton transition bound to neutral acceptors or deep donors. The PL intensity of new graphene-related peaks (3.33 eV) become more prominent with increasing G-O concentration, and it was saturated or decreased with the addition of >7.0 wt% of G-O. This feature indicates that new graphene-related states were created below conduction band of ZnO, which supports the excitonic PL enhancement by graphene-embedding is contributed not by charge transfer, but by vacancy filling effect of G-O." @default.
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- W2079935675 date "2015-04-01" @default.
- W2079935675 modified "2023-10-13" @default.
- W2079935675 title "Temperature dependent photoluminescence study on ZnO/Graphene nanocomposite films" @default.
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- W2079935675 doi "https://doi.org/10.1016/j.cap.2014.12.025" @default.
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