Berlin 2008 – wissenschaftliches Programm

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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications

SYSA 5: Poster Session SYSA

SYSA 5.83: Poster

Dienstag, 26. Februar 2008, 14:30–20:00, Poster A

The unoccupied electronic structure of potassium doped cobalt- and iron phthalocyanines studied by near edge absorption fine structure — •Victor Yu. Aristov^1,2, Olga V. Molodtsova¹, Victor N. Sivkov³, Sergei V. Nekipelov³, Victor M. Zhilin², and Martin Knupfer¹ — ¹IFW Dresden, Dresden, Germany — ²ISSP RAS, Chernogolovka, Russia — ³Syktyvkar State University, Syktyvkar, Russia

Magnetic transition metal phthalocyanines, which are organometallic complexes, have already obtained substantial attention of researchers due to many different potential applications. In particular, CoPc is often utilizing in the fields of gas and radiation sensors, optoelectronics and in medical applications. Nowadays CoPc is considered as a material for development of low dimensional molecular magnets. Such important potential applications give a strong motivation to characterize and study the electronic structure, molecular orientation and ordering in the organic semiconductor transition magnetic metal phthalocyanines thin films which is relevant to the organic film performance. The ability to incorporate electron acceptors and donors into molecular crystals enables the control of their electronic properties by introducing charge carriers. In this presentation we report the evolution of unoccupied electronic levels and electronic properties of the organic semiconductor cobalt- and iron phthalocyanines with potassium doping, which has been studied by near-edge x-ray absorption.

Acknowledgements. This work was supported by the DFG (no. 436RUS17/52/06), SFB 463 and RFBR (Grant No 05-02-17390).