Regensburg 2013 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 32: Poster Session IV: Atomic layer deposition; Organic thin films; Organic Electronics and Phototovoltaics; Organic Materials for Spintronics - from spinterface to devices; Thin film photovoltaic materials and solar cells

DS 32.44: Poster

Donnerstag, 14. März 2013, 17:00–20:00, Poster B2

Properties of Phthalocyanine Hetreojunctions for the Application as Molecular Spintronic Materials — •Torsten Hahn — Institut für Theoretische Physik, TU Freiberg, Germany

Recently charge and spin transfer at an interface between two well known transition metal phthalocyanines: MnPc and F16CoPc was observed [1]. The resulting partially charged species MnPcδ+ and F16CoPcδ- show different electronic properties compared to their bulk counterparts. Density Functional Theorie investigations her with experimental photoelectron spectroscopy measurements reveal that the transferred charge is substantially confined to the two transition metal centers and that a hybrid state is formed between the two types of phthalocyanines. The impact of those findings on charge and spin transport of the heterojunction coupled to different contact materials is discussed. Additional current-voltage characteristics calculated within the non-equilibrium green functions formalism (NEGF) reveal clear predictions about the spin-filter properties of this novel material.

[1] S. Lindner et. al, Phys. Rev. Lett. 109, 027601 (2012).