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One-reactor plasma assisted fabrication of ZnO@TiO2 multishell nanotubes: assessing the impact of a full coverage on the photovoltaic performance

AutorFilippin, Nicolas; Macías-Montero, M. ; Saghi, Zineb; Idígoras, Jesús; Sánchez-Valencia, J.R. ; Barranco, Ángel ; Migdley, Paul A.; Anta, Juan A.; Borrás, Ana
Fecha de publicación2017
EditorNature Publishing Group
CitaciónScientific Reports, 7 : 9621 (2017)
ResumenThis paper addresses the fabrication of vertically aligned ZnO@TiO2 multishell nanotubes by a combined full vacuum-plasma approach at mild temperatures. The growth is carried out within the premises of a one-reactor approach, i.e. minimizing the number of vacuum chambers and sample transferences. In this way, the interface between ZnO and TiO2 is fully preserved from humidity thus increasing ZnO durability and stability. These nanostructures are studied by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and energy dispersive X-ray spectroscopy in STEM (EDX-STEM). High density one-dimensional arrays of these nanotubes formed on FTO substrates are applied as photoanode in a dye-sensitized solar cell (DSC). The evolution of the dye adsorption capacity and solar cells parameters are explored as a function of the crystallinity and thickness of the TiO2 shell. The results show the critical effect of a full coverage by TiO2 of ZnO core to explain the mixed results found in the literature.
Versión del editorhtpp://dx.doi.org/10.1038/s41598-017-09601-7
URIhttp://hdl.handle.net/10261/155231
DOI10.1038/s41598-017-09601-7
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