Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 40: Poster Session Correlated Electrons
TT 40.46: Poster
Mittwoch, 13. März 2013, 15:00–19:00, Poster D
Thin films of the organic charge transfer compounds TMP-F4TCNQ and TMP-DTF — •Kai Ackermann1, Milan Rudloff1, Michael Bolte2, Harald Jeschke3, Matthias Wagner2, Roser Valenti3, and Michael Huth1 — 1Physikalisches Institut, Goethe-Universität, Max-von-Laue-Straße 1, 60438 Frankfurt am Main — 2Institut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Straße 7, 60438 Frankfurt am Main — 3Institut für Theoretische Physik, Goethe-Universität, Max-von-Laue-Straße 1, 60438 Frankfurt am Main
We present results of our investigations on thin films of the organic charge transfer compounds TMP-F4TCNQ [(4,5,9,10-Tetramethoxypyrene)-(2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane)] and TMP-DTF [(4,5,9,10-Tetramethoxypyrene)-(9-Dicyanomethylene-2,4,7-trinitrofluorene)]. The films were grown on silicon dioxide, silicon nitride, sodium chloride and gold substrates by using organic molecular beam deposition (OMBD). The growth properties were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray diffractometry. The structure analysis of TMP-F4TCNQ shows a triclinic symmetry with a mixed stack configuration and a layered structure of donor and acceptor molecules. First X-ray diffractograms of TMP-F4TCNQ films suggest preferential growth perpendicular to the stacking direction on silicon dioxide. Capacitance, conductivity and field effect measurements of both materials are presented and discussed in conjunction with band structure calculations within the framework of density functional theory.