Dresden 2017 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations
CPP 50.34: Poster
Wednesday, March 22, 2017, 18:30–21:00, P3
Current-Voltage Characteristics of Polymeric Phthalocyanine Thin Films — •Thi Hai Quyen Nguyen1,2, Clemens Geis1,2, and Derck Schlettwein1,2 — 1Justus-Liebig-University Giessen, Institute of Applied Physics — 2Justus-Liebig-University Giessen, Laboratory for Materials Science (LaMa)
Polymeric phthalocyanines as organic semiconductors have shown a wide range of electrical conductivity. In this work, polymeric copper phthalocyanine (CupPc) thin films were prepared by a reaction of tetracyanobenzene (TCB) with thin copper films on insulating substrates. In order to allow electrical measurements in a two-point-probe geometry electrodes of Au or Ni were vapor-deposited either directly on the substrate before film preparation or onto the prepared film subsequent to its growth. Conductivities of the organic films were determined from the current-voltage curves. The film thickness was measured with the help of a confocal laser scanning microscope and a scanning electron microscope. A more detailed examination of the cross-section of the samples revealed that either sponge-like or compact films could be formed dependent on the reaction temperature. Excess metallic copper remaining in the films after the reaction showed a strong influence on the electrical measurements as seen by thorough variation of the copper film thickness. Using X-ray diffraction the existence of metallic copper in the sample was analyzed and the presence of polymeric phthalocyanines was clearly validated.