dc.contributor.author | Ainabayev, Ardak | en |
dc.contributor.author | Shvets, Igor | en |
dc.date.accessioned | 2020-06-09T15:17:00Z | |
dc.date.available | 2020-06-09T15:17:00Z | |
dc.date.issued | 2020 | en |
dc.date.submitted | 2020 | en |
dc.identifier.citation | Pranab Biswas, Ardak Ainabayev, Ainur Zhussupbekova, Feljin Jose, Robert O Connor, Aitkazy Kaisha, Brian Walls & Igor V. Shvets, Tuning of oxygen vacancy-induced electrical conductivity in Ti-doped hematite films and its impact on photoelectrochemical water splitting, Scientific Reports, 10, 7463 (2020), 2020, 1-9 | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description.abstract | Titanium (Ti)-doped hematite (α-Fe2O3) films were grown in oxygen-depleted condition by using the spray pyrolysis technique. The impact of post-deposition annealing in oxygen-rich condition on both the conductivity and water splitting efficiency was investigated. The X-ray diffraction pattern revealed that the films are of rhombohedral α-Fe2O3 structure and dominantly directed along (012). The as-grown films were found to be highly conductive with electrons as the majority charge carriers (n-type), a carrier concentration of 1.09×1020 cm−3, and a resistivity of 5.9×10−2 Ω-cm. The conductivity of the films were reduced upon post-deposition annealing. The origin of the conductivity was attributed firstly to Ti4+ substituting Fe3+ and secondly to the ionized oxygen vacancies (VO) in the crystal lattice of hematite. Upon annealing the samples in oxygen-rich condition, VO slowly depleted and the conductivity reduced. The photocurrent of the as-grown samples was found to be 3.4 mA/cm−2 at 1.23 V vs. RHE. The solar-to-hydrogen efficiency for the as-grown sample was calculated to be 4.18% at 1.23 V vs. RHE. The photocurrents were found to be significantly stable in aqueous environment. A linear relationship between conductivity and water-splitting efficiency was established. | en |
dc.format.extent | 1-9 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Scientific Reports | en |
dc.relation.ispartofseries | 10 | en |
dc.relation.ispartofseries | 7463 (2020) | en |
dc.rights | Y | en |
dc.subject | Green fuels | en |
dc.subject | Renewable fuels | en |
dc.subject | Energy needs | en |
dc.subject | Hydrogen | en |
dc.subject | Titanium (Ti)-doped hematite | en |
dc.subject | Photoelectrochemical water splitting | en |
dc.title | Tuning of oxygen vacancy-induced electrical conductivity in Ti-doped hematite films and its impact on photoelectrochemical water splitting | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/ainabaya | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/ivchvets | en |
dc.identifier.rssinternalid | 216876 | en |
dc.identifier.doi | https://doi.org/10.1038/s41598-020-64231-w | en |
dc.rights.ecaccessrights | openAccess | |
dc.subject.TCDTheme | Nanoscience & Materials | en |
dc.subject.TCDTag | FABRICATION | en |
dc.subject.TCDTag | NANOSTRUCTURES | en |
dc.subject.TCDTag | Nanotechnology | en |
dc.subject.TCDTag | SEMICONDUCTOR DEVICES AND MATERIALS | en |
dc.subject.TCDTag | solar water splitting | en |
dc.subject.darat_impairment | Visual impairment | en |
dc.subject.darat_thematic | Health | en |
dc.status.accessible | Y | en |
dc.contributor.sponsor | Irish Research Council (IRC) | en |
dc.contributor.sponsorGrantNumber | GOIPD/2017/1275 | en |
dc.identifier.uri | https://www.nature.com/articles/s41598-020-64231-w | |
dc.identifier.uri | http://hdl.handle.net/2262/92748 | |