Epitaxial growth and electronic properties of well ordered phthalocyanine heterojunctions MnPc/F₁₆CoPc

Susi Lindner; Benjamin Mahns; Uwe Treske; Oleg Vilkov; Francisc Haidu; Michael Fronk; Dietrich R T Zahn; Martin Knupfer

doi:10.1063/1.4894757

Epitaxial growth and electronic properties of well ordered phthalocyanine heterojunctions MnPc/F₁₆CoPc

J Chem Phys. 2014 Sep 7;141(9):094706. doi: 10.1063/1.4894757.

Authors

Susi Lindner¹, Benjamin Mahns¹, Uwe Treske¹, Oleg Vilkov², Francisc Haidu³, Michael Fronk³, Dietrich R T Zahn³, Martin Knupfer¹

Affiliations

¹ IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany.
² Center for Physical Methods of Surface Investigation, St. Petersburg State University, Ulyanovskaya Str. 1, St. Petersburg 198504, Russia and Institute of Solid State Physics, University of Technology Dresden, Zellescher Weg 16, D-01062 Dresden, Germany.
³ Physics Department/Semiconductor Physics, Chemnitz University of Technology, Reichenhainer Str. 70, D-09126 Chemnitz, Germany.

PMID: 25194385
DOI: 10.1063/1.4894757

Abstract

We have prepared phthalocyanine heterojunctions out of MnPc and F16CoPc, which were studied by means of X-ray absorption spectroscopy. This heterojunction is characterized by a charge transfer at the interface, resulting in charged MnPc(δ +) and F16CoPc(δ -) species. Our data reveal that the molecules are well ordered and oriented parallel to the substrate surface. Furthermore, we demonstrate the filling of the Co 3d(z(2)) orbital due to the charge transfer, which supports the explanation of the density functional theory, that the charge transfer is local and affects the metal centers only.