Change search
ReferencesLink to record
Permanent link

Direct link
Site-dependent charge transfer at the Pt(111)-ZnPc interface and the effect of iodine
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.ORCID iD: 0000-0002-8216-5321
Show others and affiliations
2014 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 140, no 17, 174702- p.Article in journal (Refereed) Published
Abstract [en]

The electronic structure of ZnPc, from sub-monolayers to thick films, on bare and iodated Pt(111) is studied by means of X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and scanning tunneling microscopy. Our results suggest that at low coverage ZnPc lies almost parallel to the Pt(111) substrate, in a non-planar configuration induced by Zn-Pt attraction, leading to an inhomogeneous charge distribution within the molecule and an inhomogeneous charge transfer to the molecule. ZnPc does not form a complete monolayer on the Pt surface, due to a surface-mediated intermolecular repulsion. At higher coverage ZnPc adopts a tilted geometry, due to a reduced molecule-substrate interaction. Our photoemission results illustrate that ZnPc is practically decoupled from Pt, already from the second layer. Pre-deposition of iodine on Pt hinders the Zn-Pt attraction, leading to a non-distorted first layer ZnPc in contact with Pt(111)-I(root 3x root 3) or Pt(111)-I(root 7x root 7), and a more homogeneous charge distribution and charge transfer at the interface. On increased ZnPc thickness iodine is dissolved in the organic film where it acts as an electron acceptor dopant.

Place, publisher, year, edition, pages
2014. Vol. 140, no 17, 174702- p.
Keyword [en]
Charge distribution, Charge transfer, Electronic structure, Iodine, Molecules, Monolayers, Photoelectrons, Scanning tunneling microscopy, Thick films, X ray absorption spectroscopy, X ray photoelectron spectroscopy, Zinc, Electron acceptor, Intermolecular repulsions, Nonplanar configuration, Organic films, Pre-deposition, Second layer, Sub-monolayers, Tilted geometry
National Category
Other Physics Topics
URN: urn:nbn:se:kth:diva-147044DOI: 10.1063/1.4870762ISI: 000336048000034ScopusID: 2-s2.0-84900031581OAI: diva2:728913
Swedish Energy AgencySwedish Research CouncilCarl Tryggers foundation

QC 20150623

Available from: 2014-06-25 Created: 2014-06-23 Last updated: 2015-06-23Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopusarXiv:1404.7832

Search in DiVA

By author/editor
Ahmadi, SarehWojek, Bastian M.Noël, QuentinGöthelid, Mats
By organisation
Material Physics, MF
In the same journal
Journal of Chemical Physics
Other Physics Topics

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: 82 hits
ReferencesLink to record
Permanent link

Direct link