TY  - JOUR
AU  - Kröger, I.
AU  - Stadtmüller, B.
AU  - Stadler, C.
AU  - Ziroff, J.
AU  - Kochler, M.
AU  - Stahl, A.
AU  - Pollinger, F.
AU  - Lee, T.-L.
AU  - Zegenhagen, J.
AU  - Reinert, F.
AU  - Kumpf, C.
TI  - Submonolayer growth of copper-phthalocyanine on Ag(111)
JO  - New journal of physics
VL  - 12
SN  - 1367-2630
CY  - [Bad Honnef]
PB  - Dt. Physikalische Ges.
M1  - PreJuSER-16365
SP  - 083038
PY  - 2010
N1  - We acknowledge financial support from the Deutsche Forschungsgemeinschaft (KU 1531/2-1, GK 1221 and FOR 1162) and from the ESRF, Grenoble, France.
AB  - The growth of high-quality thin films is a key issue in the ability to design electronic devices based on organic materials and to tune their properties. In this context, the interfaces between metals and organic films play a decisive role. Here, we report on the interface formation between copper-phthalocyanine (CuPc) and an Ag(111) surface using various complementary methods. High-resolution low-energy electron diffraction revealed a rich phase diagram for this system with disordered (two-dimensional (2D)-gas-like) and ordered structures (commensurate and point-on-line). In particular, a continuous change in lattice parameters with increasing coverage was found for long-range ordered structures, indicating a substrate-mediated repulsive intermolecular interaction similar to the case of tin-phthalocyanine/Ag(111). Chemisorptivebonding to the substrate was found by x-ray standing waves and ultraviolet photoelectron spectroscopy, and this weakened with increasing coverage at low temperature. This remarkable effect is correlated to a shift in the highest occupied molecular orbital (HOMO) and a HOMO-1 split off band to higher binding energies. Based on our experimental results, we present a comprehensive study of the adsorption behavior of CuPc/Ag(111), including the mechanisms for phase formation and molecular interaction.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000281279700004
DO  - DOI:10.1088/1367-2630/12/8/083038
UR  - https://juser.fz-juelich.de/record/16365
ER  -