Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 19: SYMPOSIUM Functional Organic Thin Films I
CPP 19.3: Vortrag
Donnerstag, 30. März 2006, 10:15–10:30, ZEU Lich
Interaction of Me atoms with thin organic films: In (Sn, K)/CuPc — •Olga Molodtsova1, Victor Aristov1,2, Victor Zhilin2, Denis Vyalikh3, and Martin Knupfer1 — 1Leibniz IFW Dresden, Germany — 2ISSP, RAS Chernogolovka, Russia — 3IFF, TU Dresden, Germany
Among the Organic Molecular Thin Film Crystals the family of the phthalocyanines (Pc*s) plays an important role and many researchers pay attention to this materials. In the present investigation we have focused on the evolution of the electronic structure of CuPc films during metal deposition and on interactions during this process. The measurements were performed by means of high-resolution photoemission electron spectroscopy, core-level and valence-band, and using synchrotron-radiation facility. In particular we have found, that e.g. the In deposition onto CuPc films is characterized by two stages of the In/CuPc interface formation. The first stage takes place until a nominal In coverage of 6 Å and is characterized by strong diffusion of the In atoms into the organic film. In atoms occupy sites close to the pyrolle nitrogens, strongly interact and transfer negative charge to CuPc. This stage comes to the end when a stoichiometry of In2CuPc is reached. The second stage begins just after the first is completed, at about 7 Å: on top of the In2CuPc compound a metallic indium film is formed. This behavior will be compared with formation of Sn (K)/CuPc interfaces.