Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 29: Poster: Molecular Spintronics, Biomolecular and Functional Organic Layers, Organic Electronics and Photovoltaics, Plasmonics and Nanophotonics, Organic Thin Films, Nanoengineered Thin Films, Thin Film Characterisation,
DS 29.3: Poster
Mittwoch, 24. März 2010, 15:00–17:30, Poster A
Spectroelectrochemical Characterization of Thin Films of Hexadecafluorophthalocyaninatozinc Prepared by Vapour Deposition — •Mareike Falk, Stefanie Nagel, Christopher Keil, and Derck Schlettwein — Institute of Applied Physics, Justus-Liebig-University Giessen, Germany. email:schlettwein@uni-giessen.de
Thin films (10-100nm) of hexadecafluorophthalocyaninatozinc(II) (F16PcZn) were prepared by vapour deposition. The films were characterized by cyclic voltammetry in 1M LiCl as electrolyte with concomitant UV/Vis spectroscopy. Potential was applied between 0.6 and -1.1 V vs. SCE and scan rate was varied from 2 to 100 mV/s. During reduction of F16PcZn in a first step a radical anion was formed and in a second step a dianion was generated. For charge balance Li+ counter ions were intercalated into the film. During the first cycles in cyclic voltammetry of freshly prepared films the initiation of the films could be monitored by the increase of the charge uptake most likely caused by the successive expansion of the structure due to intercalation of lithium ions as charge balancing ions. After the initiation the films remained stable and a nearly reversible reaction could be observed. The current densities of the reduction and reoxidation peaks showed linear dependence on the square root of scan rate which indicated the diffusion of counter ions in the films as the rate determining step.