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Charge transfer dynamics at model metal-organic solar cell surfaces

Taylor, John B.; Mayor, Louise C.; Swarbrick, Janine C.; O'Shea, James N. and Schnadt, Joachim LU (2007) In Journal of Physical Chemistry C 111(44). p.16646-16655
Abstract
The "core-hole clock" implementation of resonant photoemission has been used to investigate the charge-transfer dynamics of bi-isonicotinic acid molecules (4,4'-dicarboxy-2,2'-bipyridine) adsorbed on a rutile TiO2(110) surface containing varying densities of gold islands. In the presence of, nominally, a few monolayers of gold there exists a strong coupling between the adsorbed molecules and the surface. This is derived from the measurement of a <3 fs charge-transfer time for the injection of a core-excited electron into the substrate. This ultrafast charge-transfer time is quenched for a fraction of the molecules upon the addition of only a few further monolayers of gold. There is evidence to suggest that this effect derives from a... (More)
The "core-hole clock" implementation of resonant photoemission has been used to investigate the charge-transfer dynamics of bi-isonicotinic acid molecules (4,4'-dicarboxy-2,2'-bipyridine) adsorbed on a rutile TiO2(110) surface containing varying densities of gold islands. In the presence of, nominally, a few monolayers of gold there exists a strong coupling between the adsorbed molecules and the surface. This is derived from the measurement of a <3 fs charge-transfer time for the injection of a core-excited electron into the substrate. This ultrafast charge-transfer time is quenched for a fraction of the molecules upon the addition of only a few further monolayers of gold. There is evidence to suggest that this effect derives from a change in the bonding configuration of bi-isonicotinic acid molecules. However, results also support the occurrence of ultrafast back-transfer from Au states to core-excited unoccupied molecular states. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
111
issue
44
pages
16646 - 16655
publisher
The American Chemical Society
external identifiers
  • wos:000250647000080
  • scopus:36348963527
ISSN
1932-7447
DOI
10.1021/jp075366d
language
English
LU publication?
yes
id
68c586ce-825c-47e3-9da1-0abfafca1a30 (old id 630893)
date added to LUP
2007-11-28 15:13:02
date last changed
2017-05-28 03:37:07
@article{68c586ce-825c-47e3-9da1-0abfafca1a30,
  abstract     = {The "core-hole clock" implementation of resonant photoemission has been used to investigate the charge-transfer dynamics of bi-isonicotinic acid molecules (4,4'-dicarboxy-2,2'-bipyridine) adsorbed on a rutile TiO2(110) surface containing varying densities of gold islands. In the presence of, nominally, a few monolayers of gold there exists a strong coupling between the adsorbed molecules and the surface. This is derived from the measurement of a &lt;3 fs charge-transfer time for the injection of a core-excited electron into the substrate. This ultrafast charge-transfer time is quenched for a fraction of the molecules upon the addition of only a few further monolayers of gold. There is evidence to suggest that this effect derives from a change in the bonding configuration of bi-isonicotinic acid molecules. However, results also support the occurrence of ultrafast back-transfer from Au states to core-excited unoccupied molecular states.},
  author       = {Taylor, John B. and Mayor, Louise C. and Swarbrick, Janine C. and O'Shea, James N. and Schnadt, Joachim},
  issn         = {1932-7447},
  language     = {eng},
  number       = {44},
  pages        = {16646--16655},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Charge transfer dynamics at model metal-organic solar cell surfaces},
  url          = {http://dx.doi.org/10.1021/jp075366d},
  volume       = {111},
  year         = {2007},
}