Interface formation and growth of a thin film of ZnPcCl8/Ag(111) studied by photoelectron spectroscopy

被引：13

作者：

Amsalem, P. ^{[1
]}

Giovanelli, L. ^{[1
]}

Themlin, J. M. ^{[1
]}

Koudia, M. ^{[1
]}

Abel, M. ^{[1
]}

Oison, V. ^{[1
]}

Ksari, Y. ^{[1
]}

Mossoyan, M. ^{[1
]}

Porte, L. ^{[1
]}

机构：

[1] Fac Sci & Tech St Jerome, CNRS, UMR 6137, Lab Mat & Microelect Provence, F-13397 Marseille 20, France

来源：

SURFACE SCIENCE | 2007年 / 601卷 / 18期

关键词：

photoelectron spectroscopy; organic semiconductors; silver; metal-semiconductor interfaces; self-assembly; work function measurements; interface dipole; chemisorption;

D O I：

10.1016/j.susc.2007.04.080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the electronic properties of a thin film of ZnPcCl8 molecules deposited on Ag(1 1 1) using ultra-violet photoelectron spectroscopy. Close to one monolayer the electronic structure differs sensibly from that of the thick film. The appearance of a density of states close to the Fermi level is interpreted as the sign of the molecule-substrate interaction via a charge transfer mechanism. An increase of the work function at the early stages of adsorption confirms that electrons are transferred from the metal to the molecular orbitals creating an interface dipole. As the coverage is increased the weak interaction between molecules of successive layers causes the electronic properties to evolve gradually towards those of the thick film. Finally, the impact of the interface electronic properties on the intermolecular interaction is discussed. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：4185 / 4188

页数：4

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