Hamburg 2001 – scientific programme

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SYOF: Organische Festkörper

SYOF 5: Poster Session

SYOF 5.28: Poster

Tuesday, March 27, 2001, 17:00–19:00, Aula S3

Photoemission spectroscopy on copper phthalocyanine in the pristine and reduced state — •Torsten Schwieger, Heiko Peisert, Martin Knupfer, Mark S. Golden, and J"org Fink — Institute for Solid State Research, IFW Dresden, P.O.Box 270016, D-01171 Dresden, Germany

Copper phthalocyanine (CuPc) is one of the materials which are commonly used in organic electronic devices like transistors and diodes.
We have studied the electronic structure of pristine and potassium intercalated CuPc thin films using photoemission spectroscopy. The intercalation induced spectral changes indicate the transfer of the K 4s electrons to the lowest unoccupied molecular orbital (LUMO) of CuPc which is accompanied with a variation of the effective charge at the Cu site. This shows that the LUMO in CuPc not only is composed of N2p and C2p orbitals but also has finite Cu3d character. (This work was supported by the BMBF under 05 SF8 BD 11.)