Regensburg 2004 – wissenschaftliches Programm
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SYOH: Organic and Hybrid Systems for Future Electronics
SYOH 5: Poster
SYOH 5.24: Poster
Donnerstag, 11. März 2004, 18:00–21:00, B
Orientation of phthalocyanine thin films on disordered substrates — •Heiko Peisert1,2, Indro Biswas1, Torsten Schwieger2, Martin Knupfer2, Andreas Petr2, Lothar Dunsch2, Danilo Dini3, Michael Hanack3, and Thomas Chasse1 — 1University of Tuebingen, IPC, Auf der Morgenstelle 8, 72076 Tuebingen, Germany — 2Leibniz Institute for Solid State Research Dresden, P.O. Box 270116, D-01171 Dresden, Germany — 3University of Tuebingen, Inst. Organ. Chem., Auf der Morgenstelle 18, D-72076 Tuebingen, Germany
We have studied the molecular orientation of fluorinated metallophthalocyanines (CuPCFx with x = 0, 4, 16), and of tetra tert-butyl magnesium phthalocyanine (MgPC(t-bu)4) on technically relevant organic and inorganic substrates using polarisation-dependent x-ray absorption spectroscopy. As organic substrate a mixture of poly-3,4-ethylenedioxy-thiophene (PEDOT) and polystyrenesulfonate (PSS) was chosen, often applied as electrode material in (all-)organic semiconductor devices. Although we observe a chemical interaction at the PC/PEDOT:PSS interface and a diffusion of Pc molecules into the polymer film [1], CuPcFx grows in an ordered, "standingNo-dq geometry on this substrate.
The tert-butyl metallophthalocyanines are highly soluble and thus they are especially suitable for solution processed organic semiconductor thin films. On polycrystalline gold evaporated MgPc(t-bu)4 molecules are as highly ordered as CuPC. However, on Au(100) we observe a very high orientation (the molecules lie) only for (sub-) monolayer coverages.
[1] H. Peisert et al. Appl. Phys. Lett. 83 (2003) 3930