Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Metal substrates: Adsorption of organic / bio molecules VII
O 65.5: Vortrag
Donnerstag, 17. März 2011, 12:15–12:30, PHY C213
Systematic studies of bonding distances of diindenoperylene on noble metal surfaces — •Christoph Bürker1, Alexander Gerlach1, Takuya Hosokai1, Jens Niederhausen2, Blanka Detlefs3, Norbert Koch2, and Frank Schreiber1 — 1Institut für Angewandte Physik, Universität Tübingen, 72076 Tübingen, Germany — 2Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — 3ESRF, 38043 Grenoble Cedex, France
The interaction of organic semiconducting molecules with different substrates is essential for the understanding of these systems and for possible applications in organic electronic devices. Diindenoperylene (DIP) is one promising semiconductor and has been studied widely in the recent years concerning its growth and ordering behavior on different substrates as well as electronic properties [1]. Despite these efforts the bonding distance d0 and thus the coupling to the substrate is still an unknown key parameter of DIP adsorption.
Here we present a systematic study of d0 of DIP on Cu(111), Ag(111) and Au(111) surfaces, determined by the X-ray standing wave (XSW) technique [2]. Different bonding distances for different substrates indicate a substrate dependent interaction strength. Our results are compared with the well-established bonding distances and interaction strength of PTCDA on the same noble metal surfaces. Interesting similarities as well as differences between the two molecules are discussed.
[1] A. C. Dürr et al., Phys. Rev. B 68, 115428 (2003)
[2] A. Gerlach et al., Phys. Rev. B 71, 205425 (2005)