corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 96 » Issue 15
< Previous Article | Next Article >

Phys. Rev. Lett. 96, 156803 (2006) [4 pages]

Evidence for Temperature-Dependent Electron Band Dispersion in Pentacene

Download: PDF (311 kB) Buy this article Export: BibTeX or EndNote (RIS)

N. Koch1,*, A. Vollmer2, I. Salzmann1, B. Nickel3,†, H. Weiss4, and J. P. Rabe1
1Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany
2Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m.b.H., D-12489 Berlin, Germany
3Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
4Chemisches Institut, Otto-von-Guericke-Universität Magdeburg, D-39106 Magdeburg, Germany

Received 7 November 2005; published 19 April 2006

Evidence for temperature-dependent electron band dispersion in a pentacene thin film polymorph on graphite is provided by angle- and energy-dependent ultraviolet photoelectron spectroscopy. The bands derived from the highest occupied molecular orbital exhibit dispersion of ∼190  meV at room temperature, and ∼240  meV at 120 K. Intermolecular electronic coupling in pentacene thin films is thus confirmed to be dependent on temperature and possibly crystal structure, as suggested by additional infrared absorption measurements.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.156803
DOI:
10.1103/PhysRevLett.96.156803
PACS:
73.20.At, 68.55.−a, 71.20.−b

*Corresponding author.

Email address: norbert.koch@physik.hu-berlin.de

†Present address: Ludwig-Maximilians-Universität München, Department für Physik & CeNS, D-80539 München, Germany.

 
< Previous Article | Next Article >