Dresden 2020 – wissenschaftliches Programm

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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 Büchner11Leibniz 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)

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