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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 32: Poster: Organic Semiconductors

CPP 32.4: Poster

Mittwoch, 13. März 2013, 16:30–18:30, Poster C

Linear X-ray dichroism of perylene diimide derivatives and its correlation with their transport properties — •Nina Zeilmann¹, Susanne Backes², Benedikt Rösner¹, Andreas Späth¹, Katrin Ludwig¹, Andreas Hirsch², and Rainer H. Fink¹ — ¹FAU Erlangen-Nürnberg, Physical Chemistry II and ICMM, Erlangen, Germany — ²FAU Erlangen-Nürnberg, Organic Chemistry II and ZMP, Erlangen, Germany

The development of organic semiconductors for organic electronic applications has undergone notable progress during the last years. While hole transporting p-type semiconductors have already shown performances comparable to their inorganic analogues, competitive electron transporting n-type materials still pose a challenge. Among these materials, perylene diimide derivatives are very promising and interesting candidates. Since the transport properties are often strongly correlated with the microstructure of the organic films, microscopic probes that provide high chemical specificity and sensitivity to molecular orientation at high spatial resolution are required. Scanning transmission X-ray microspectroscopy (STXM) ideally combines these requirements. Within this contribution we present a microspectroscopic analysis of thin films of various perylene diimide derivatives prepared on Si3N4 membranes. Polarization dependent light microscopy gives clear evidence on the growth of large domains with preferential molecular orientations. Using STXM, film and orientational homogeneities can directly be correlated with the electronic transport properties. The project is funded by the BMBF, contract 05K10WEA.