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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Organic semiconductors I (joint session HL/CPP)
CPP 9.5: Vortrag
Montag, 16. März 2020, 10:30–10:45, POT 112
Conductivity studies at the crystal-film charge transfer interfaces — •Bipasha Debnath1, Michael Bretschnieder1, Shu-Jen Wang2, Martin Knupfer1, Yulia Krupskaya1, and Bernd Büchner1 — 1Leibniz Institute for Solid State and Material Research Dresden, Dresden, Germany — 2Dresden Integrated Center for Applied Physics and Photonic Materials (IAP), Dresden, Germany
The charge transfer occurs at the interface of two organic semiconductor materials known as donor and acceptors. The alignment of the electron affinity of one material with the ionization potential of other material leads to enhance electrical conductivity at their interface by exchanging charge carriers between them. Herein, we try to explore the underlying mechanism of charge transfer with a systematic study by preparing interfaces between Rubrene and F6-TCNNQ, as donor and acceptor semiconductor materials, respectively. By thermally evaporating F6-TCNNQ film on the surface of highly-ordered Rubrene single-crystals, the charge transfer interfaces are fabricated. The electrical characterization of these interfaces reveals enhanced conductivity. Furthermore, temperature-dependent measurements demonstrate thermally activated conductivity. The fundamental properties such as charge carrier density and mobility are investigated through additional Hall-effect measurements. This work is financially supported by DFG (KR 4364/4-1)