Skip to main content

Research Repository

Advanced Search

Charge transfer from an adsorbed ruthenium-based photosensitizer through an ultra-thin aluminium oxide layer and into a metallic substrate

Gibson, Andrew J.; Temperton, Robert H.; Handrup, Karsten; Weston, Matthew; Mayor, Louise Charlotte; O'Shea, James N.

Charge transfer from an adsorbed ruthenium-based photosensitizer through an ultra-thin aluminium oxide layer and into a metallic substrate Thumbnail


Authors

Andrew J. Gibson

Robert H. Temperton

Karsten Handrup

Matthew Weston

Louise Charlotte Mayor

Profile Image

JAMES O'SHEA J.OSHEA@NOTTINGHAM.AC.UK
Associate Professor and Reader in Physics



Abstract

The interaction of the dye molecule N3 (cis-bis(isothiocyanato)bis(2,2-bipyridyl-4,4′-dicarbo-xylato)-ruthenium(II)) with the ultra-thin oxide layer on a AlNi(110) substrate, has been studied using synchrotron radiation based photoelectron spectroscopy, resonant photoemission spectroscopy, and near edge X-ray absorption fine structure spectroscopy. Calibrated X-ray absorption and valence band spectra of the monolayer and multilayer coverages reveal that charge transfer is possible from the molecule to the AlNi(110) substrate via tunnelling through the ultra-thin oxide layer and into the conduction band edge of the substrate. This charge transfer mechanism is possible from the LUMO+2 and 3 in the excited state but not from the LUMO, therefore enabling core-hole clock analysis, which gives an upper limit of 6.0 ± 2.5 fs for the transfer time. This indicates that ultra-thin oxide layers are a viable material for use in dye-sensitized solar cells, which may lead to reduced recombination effects and improved efficiencies of future devices.

Citation

Gibson, A. J., Temperton, R. H., Handrup, K., Weston, M., Mayor, L. C., & O'Shea, J. N. (2014). Charge transfer from an adsorbed ruthenium-based photosensitizer through an ultra-thin aluminium oxide layer and into a metallic substrate. Journal of Chemical Physics, 140(234708), Article 234708. https://doi.org/10.1063/1.4882867

Journal Article Type Article
Publication Date Jun 20, 2014
Deposit Date Feb 16, 2016
Publicly Available Date Mar 29, 2024
Journal Journal of Chemical Physics
Print ISSN 0021-9606
Electronic ISSN 1089-7690
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 140
Issue 234708
Article Number 234708
DOI https://doi.org/10.1063/1.4882867
Keywords charge transfer, surface photoemission, monolayers, multilayers, x-ray absorption
Public URL https://nottingham-repository.worktribe.com/output/730325
Publisher URL http://scitation.aip.org/content/aip/journal/jcp/140/23/10.1063/1.4882867
Additional Information Copyright 2014 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in The journal of chemical physics, v. 140 (234708) and may be found at http://scitation.aip.org/content/aip/journal/jcp/140/23/10.1063/1.4882867

Files





You might also like



Downloadable Citations