TY - JOUR
T1 - Influence of molecular conformation on organic/metal interface energetics
AU - Koch, Norbert
AU - Heimel, Georg
AU - Wu, Jishan
AU - Zojer, Egbert
AU - Johnson, Robert L.
AU - Brédas, Jean Luc
AU - Müllen, Klaus
AU - Rabe, Jürgen P.
N1 - Funding Information:
This work was supported by the SFB 448 of the Deutsche Forschungsgemeinschaft. We thank J.-J. Pireaux and J. Ghijsen for providing experimental equipment. The work at Georgia Tech was partly supported by the National Science Foundation (through the STC Program under Award Number DMR-0120967 and grant CHE-0342321) and the Department of Energy (DE-F02-04ER46164). Synchrotron work was supported by the IHP-Contract HPRI-CT-1999-00040/2001-00140 of the European Commission.
PY - 2005/9/26
Y1 - 2005/9/26
N2 - Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.
AB - Using ultraviolet photoemission spectroscopy (UPS), we show that the conformation of a conjugated organic molecule can be changed significantly upon adsorption on a metal surface, even in the case of weak interactions with the metal. This is accomplished by comparing the thickness-dependent spectral evolution for a non-rigid non-planar molecule (p-sexiphenyl) deposited onto Ag(1 1 1), with those of a coplanar molecule (α-sexithienyl) and a rigid non-planar one (1,3,4,6,7,9,10,12,13,15,16,18-dodecamethyl-hexa-peri- hexabenzocoronene). Molecular conformation changes can influence hole injection barriers by at least 0.1 eV. These results have a direct impact on the detailed understanding of organic/metal interfaces.
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U2 - 10.1016/j.cplett.2005.08.004
DO - 10.1016/j.cplett.2005.08.004
M3 - Article
AN - SCOPUS:24644437292
SN - 0009-2614
VL - 413
SP - 390
EP - 395
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -