Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Inorganic/Organic Interfaces

O 41.44: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster B

Structural analysis of ordered monolayers of the lander-type molecule DBP on Ag(100) via STM and LEED — •Timo Heepenstrick, Yifei Zhang, Ina Krieger, and Moritz Sokolowski — Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstraße 12, 53115 Bonn

We investigated the perylene derivate lander-type molecule DBP (dibenzotetraphenylperiflanthene). It consists of a stiff body and four rotatable phenyl groups on the edges. DBP has recently been used as an electron donor in organic solar cells [1]. We investigated the adsorption on the Ag(100) surface via STM and LEED at room temperature. From LEED images we found one incommensurate structure with a quadratic unit cell of 2.98 nm side length containing two molecules each. It exhibits a p4g symmetry with two symmetry equivalent rotation domains. The molecule forms large islands on the substrate, which can be observed by STM.

[1]D. Fujishima et al. Solar Energy Mat. and Solar Cells 93, 1029, (2009).