Anisotropy in ordered sexithiophene thin films studied by angle-resolved photoemission using combined laser and synchrotron radiation

Journal Article · Mon Aug 29 00:00:00 EDT 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2034105· OSTI ID:20709744

Heiner, C E; Dreyer, J; Hertel, I V; Koch, N; Ritze, H -H; Widdra, W; Winter, B ^[1]

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1. Max-Born-Institut fuer Nichtlineare Optik and Kurzzeitspektroskopie, Max-Born-Str. 2A, D-12489 Berlin (Germany)

We present angle-resolved photoemission (PE) spectra of ordered multilayer sexithiophene (6T) films, 200 nm thick, grown on a Au(110) single crystal. However, the measurement of sharp and nonshifted PE spectral features from the low-conducting organic material is only possible if the positive surface charge, generated in the PE process, is fully compensated. We have accomplished this by simultaneous laser irradiation. On the basis of the resulting data we found that for these thick films the 6T molecules are preferentially oriented with their long axes nearly normal to the surface.

• OSTI ID: 20709744
• Journal Information: Applied Physics Letters, Vol. 87, Issue 9; Other Information: DOI: 10.1063/1.2034105; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
GOLD
LASER RADIATION
LASERS
MONOCRYSTALS
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
SYNCHROTRON RADIATION
THIN FILMS
THIOPHENE