uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Adsorption geometry, molecular interaction, and charge transfer of triphenylamine-based dye on rutile TiO2(110)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
Show others and affiliations
2010 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 133, no 22, 224704- p.Article in journal (Refereed) Published
Abstract [en]

The fast development of new organic sensitizers leads to the need for a better understanding of the complexity and significance of their adsorption processes on TiO2 surfaces. We have investigated a prototype of the triphenylamine-cyanoacrylic acid (donor-acceptor) on rutile TiO2 (110) surface with special attention on the monolayer region. This molecule belongs to the type of dye, some of which so far has delivered the record efficiency of 10%-10.3% for pure organic sensitizers [W. Zeng, Y. Cao, Y. Bai, Y. Wang, Y. Shi, M. Zhang, F. Wang, C. Pan, and P. Wang, Chem. Mater. 22, 1915 (2010)]. The molecular configuration of this dye on the TiO2 surface was found to vary with coverage and adopt gradually an upright geometry, as determined from near edge x-ray absorption fine structure spectroscopy. Due to the molecular interaction within the increasingly dense packed layer, the molecular electronic structure changes systematically: all energy levels shift to higher binding energies, as shown by photoelectron spectroscopy. Furthermore, the investigation of charge delocalization within the molecule was carried out by means of resonant photoelectron spectroscopy. A fast delocalization (similar to 1.8 fs) occurs at the donor part while a competing process between delocalization and localization takes place at the acceptor part. This depicts the "push-pull" concept in donor-acceptor molecular system in time scale.

Place, publisher, year, edition, pages
2010. Vol. 133, no 22, 224704- p.
National Category
Chemical Sciences Physical Sciences
URN: urn:nbn:se:uu:diva-144503DOI: 10.1063/1.3509389ISI: 000285477800019OAI: oai:DiVA.org:uu-144503DiVA: diva2:393754
Available from: 2011-02-01 Created: 2011-01-31 Last updated: 2014-02-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Tian, HainingHennies, Franz
By organisation
Department of Physical and Analytical Chemistry
In the same journal
Journal of Chemical Physics
Chemical SciencesPhysical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 388 hits
ReferencesLink to record
Permanent link

Direct link