Abstract
Zinc oxide (ZnO) nanostructures were successfully grown directly on single walled carbon nanotubes (SWCNT) template through the CO2 laser-induced chemical liquid deposition (LCLD) process. Photoluminescence (PL) of the deposited ZnO/SWCNT hybrid composites exhibits, at room temperature, a narrow near UV band located at 390 nm with no emission bands in the visible region, indicating a high degree of crystalline quality of the ZnO nanostructures. Moreover, when the relative SWCNT loads are varied within the composites, the PL intensity and the diffused optical reflectance diminish in comparison with those of ZnO alone, owing to the transfer of photo-excited electrons from ZnO to the SWCNT, and the enhancement of the optical absorbance, respectively. Finally, these ZnO/SWCNT hybrid composites are integrated into a heterojunction photovoltaic-based device, using PEDOT:PSS on ITO/glass substrate. The devices show an evident p–n junction behavior in the dark, and a clear I–V curve shift downward when illuminated with an open-circuit voltage of 1.1 V, a short circuit current density of 14.05 μA cm−2, and a fill factor of ∼35%. These results indicate that these composites fabricated via LCLD process could be promising for optoelectronic and energy-harvesting devices.
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Acknowledgements
We acknowledge financial support from Qatar Environment and Energy Research Institute (QEERI, Seed Project S-1502), at Hamad Bin Khalifa University-Qatar Foundation (Doha, Qatar). The authors acknowledge as well the financial support from FQRNT (Le Fonds Québécois de la Recherche sur la Nature et les Technologies) and NSERC (the Natural Sciences and Engineering Research Council of Canada).
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Aïssa, B., Nedil, M., Belaidi, A. et al. Photoluminescence quenching, structures, and photovoltaic properties of ZnO nanostructures decorated plasma grown single walled carbon nanotubes. J Nanopart Res 19, 157 (2017). https://doi.org/10.1007/s11051-017-3854-2
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DOI: https://doi.org/10.1007/s11051-017-3854-2