Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Poster: Organic-Inorganic Hybrid Systems and Organic Films

O 42.17: Poster

Dienstag, 13. März 2018, 18:15–20:30, Poster A

Thermal stability and interlayer exchange processes of MePc-PTCDA heterostructures on Ag(111) — •Sebastian Thussing and Peter Jakob — Fachbereich Physik, Philipps-Universität Marburg, Renthof 5, 35032 Marburg, Germany

The growth and thermal stability of organic heterolayers containing PTCDA and either CuPc or TiOPc have been investigated. Thereby the adsorption geometry and layering of individual species is derived from IR absorption spectroscopy. Information regarding long range order is obtained from SPA-LEED data. Throughout all processing a parallel orientation of the π-conjugated backbone of the deposited molecules is found. Thermal stability of the original layering and the produced organic-organic interface depends crucially on the nature and sequence of deposited species. Heterolayer interfaces involving PTCDA contact layers show excellent stability due to the favorable adsorption energy per unit area for PTCDA in comparison to the phthalocyanines [1]. Another key observation is that all layers comprising double layers of the face-to-face oriented TiOPc species display particular high resistance with respect to thermal annealing, i.e. regarding interlayer exchange and desintegration of the double layer membrane.
S. Thussing and P. Jakob, J. Phys. Chem. C 121 (2017) 13680-13691.