The UV photoconductivity of the core- shell structure with three times TiO2 coating has been largely enhanced due to photoelectron transfer between the core and the shell.
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The ultraviolet (UV) emission intensity of the nanocomposite is largely quenched due to an efficient electron-hole separation reducing the band-to-band recombinations. The core- shell nanocomposites are composed of single-crystalline ZnO NRs, coated with a thin TiO2 shell layer obtained by varying the number of coatings (one, three and five times). © The Royal Society of Chemistry 2011Ĭore- shell ZnO nanorods for efficient ultraviolet photodetectionĬore- shell ZnO nanorods (NRs) have been fabricated by a simple two step method: growth of ZnO NRs' array by an aqueous chemical technique and then coating of the NRs with a solution of titanium isopropoxide followed by a heating step to form the shell. The UV photosensitivity of the nanocomposite becomes four times larger while the photocurrent decay during steady UV illumination has been decreased almost by 7 times compared to the as-grown ZnO NRs indicating high efficiency of these core- shell structures as UV sensors. The UV photoconductivity of the core- shell structure with three times TiO(2) coating has been largely enhanced due to photoelectron transfer between the core and the shell.
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The core- shell nanocomposites are composed of single-crystalline ZnO NRs, coated with a thin TiO(2) shell layer obtained by varying the number of coatings (one, three and five times). These results may provide a promising pathway to obtain the high efficient DSSCs.« lessĬore- shell ZnO nanorods for efficient ultraviolet photodetection.Ĭore- shell ZnO nanorods (NRs) have been fabricated by a simple two step method: growth of ZnO NRs' array by an aqueous chemical technique and then coating of the NRs with a solution of titanium isopropoxide followed by a heating step to form the shell. Several samples consisting of ZnO nanorods were initially grown over TiO photoanode ofmore » the DSSC in the presence of N719 dye and iodine–based electrolyte, and the results reveal that the DSSCs based on triple shelled ZnO microsphere with a mesoporous surface exhibit an enhanced PCE of 7.66%, which is 13.0% higher than those without the scattering layers (6.78%), indicating that multiple- shelled microspheres with a mesoporous surface can ensure enough light scattering between the shells, and a favorable concentration of the adsorbed dye can improve the light penetration. Pizá-Ruiz, P.Ĭore– shell nanorod structures were prepared by a sequential synthesis using an aerosol assisted chemical vapor deposition technique.
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Single and multi- layered core- shell structures based on ZnO nanorods obtained by aerosol assisted chemical vapor deposition