# Doping of C60 sub monolayers by Fermi level pinning induced electron transfer

@article{Niederhausen2012DopingOC,
title={Doping of C60 sub monolayers by Fermi level pinning induced electron transfer},
author={Jens Niederhausen and Patrick Amsalem and Andreas Wilke and Raphael Schlesinger and Stefanie Winkler and Antje Vollmer and J{\"u}rgen P. Rabe and Norbert Koch},
journal={Physical Review B},
year={2012},
volume={86}
}
Fermi-level pinning of C60 (sub)-monolayers on a sexithiophene (6T) bilayer grown on Ag(111) is shown to induce electron transfer from the metal to a fraction of the C60 molecules. The electrostatic potential resulting from the charge transfer process is responsible for a potential drop within the 6T interlayer and, more remarkably, for dipole-dipole repulsion, leading to a disproportionation into coexisting neutral and charged C60 molecules. We suggest that charge ordering phenomena may occur… Expand
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#### References

SHOWING 1-10 OF 35 REFERENCES
Electric fields induced by energy level pinning at organic heterojunctions
• Physics
• 2011
We investigated the energy levels at organic heterojunctions comprising the donor diindenoperylene (DIP) on top of the acceptor C60 with photoelectron spectroscopy. The intermolecular interaction isExpand
Metal-to-Acceptor Charge Transfer through a Molecular Spacer Layer
We investigate how the thermodynamic equilibrium is reached when a strong electron acceptor molecule (hexaaza-triphenylene-hexacarbonitrile, HATCN) is deposited on Ag(111) precovered with aExpand
Energy level alignment between sexithiophene and buckminsterfullerene films
• Chemistry
• 2007
Ultraviolet photoelectron spectroscopy has been used to investigate the interface between thermally deposited α-sexithiophene (6T) and buckminsterfullerene (C60) films on gold surfaces. ChargeExpand
Optimized hole injection with strong electron acceptors at organic-metal interfaces.
• Materials Science, Medicine
• Physical review letters
• 2005
The energy-level alignment at interfaces between three electroactive conjugated organic materials and Au was systematically varied by adjusting the precoverage of the metal substrate with theExpand
Understanding the Electronic Structure of Metal/SAM/Organic−Semiconductor Heterojunctions
• Materials Science, Medicine
• ACS nano
• 2009
Surprisingly, although in most cases the pinning occurs only when the metal is present, it is not related to charge transfer between the electrode and the organic layer, and charge rearrangements at the interface between the SAM and the OSC are observed. Expand
Energy level alignment and interface states at α-sexithiophene/Ag interfaces
• Chemistry
• 2007
Abstract We present a combined X-ray and ultraviolet photoemission study of the interface between the thiophene based organic semiconductor α-sexithiophene (6T) and silver. Thermally evaporatedExpand
Modulation of surface charge transfer through competing long-range repulsive versus short-range attractive interactions
We report a combined experimental and theoretical study of the modulation of surface charge transfer on the tetrathiafulvalene (TTF)/Au(111) interface as a function of coverage in the submonolayerExpand
Reversible phase transformation and doubly charged anions at the surface of simple cubic RbC60.
• Materials Science, Medicine
• Physical review letters
• 2008
The simple cubic phase of a RbC60 thin film has been studied using photoelectron spectroscopy and a molecular charge state is identified in the valence band and core-level photoemission spectra which arises from C60(2-) anions and contributes to the spectral intensity at the Fermi level. Expand
Vacuum level alignment at organic/metal junctions: “Cushion” effect and the interface dipole
• Physics
• 2005
The electronic level alignment of various organic molecules on metal surfaces has been determined by a combined experimental and theoretical effort. Using ab initio electronic structure calculations,Expand
Second-layer induced island morphologies in thin-film growth of fullerenes.
• Materials Science, Medicine
• Physical review letters
• 2011
A kinetic growth model is developed that unravels the microscopic mechanisms of the structure formation of CaF(2)(111) islands and finds a smooth transition from compact, triangular islands to branched hexagonal islands upon lowering the temperature. Expand