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DS: Fachverband Dünne Schichten
DS 44: Postersession II
DS 44.21: Poster
Thursday, March 23, 2017, 17:00–19:00, P1C
In-depth analysis of nanomorphology in thin films of 6,13-dihydro-6,13-diazapentacene — •Xiaoyan Du1, Lisa Müller2, Nicolai Burzlaff2, and Rainer H. Fink1 — 1Physical Chemistry 2 and ICMM Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Egerlandstr. 3, 91058 Erlangen, Germany — 2Inorganic Chemistry, Department of Chemistry and Pharmacy Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstr. 1, 91058 Erlangen, Germany
6,13-Dihydro-6,13-diazapentacene (DHDAP) is one of the important pentacene derivatives due to its ability to be easily derivatized, or its environmental stability and its solubility. The performance of organic field-effect transistors (OFETs) based on DHDAP has been found to be extremely sensitive to the substrates nature and temperature, which induces different polymorphs. We employ several complementary microspectroscopic probes to investigate the structure of thermally evaporated films evaporated at different conditions. Detailed analysis of atomic force microscopy (AFM), scanning transmission X-ray microscopy (STXM) and resonant soft X-ray scattering (RSoXS) reveals the dependence of the crystalline domain size on the film preparation conditions. Angle-resolved near edge x-ray absorption fine structure (NEXAFS) spectroscopy sheds lights on the molecular orientation of the molecules close to the substrates. Thus, the structure-property relations offer further insights into the transport properties of the respective OFETs devices. This work is funded by the DFG within GRK 1896.