Charge Transfer and Polarization Screening at Organic/Metal Interfaces: Distinguishing between the First Layer and Thin Films

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• 作者：H. Peisert ; A. Petershans ; T. Chass&eacute
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：April 17, 2008
• 年：2008
• 卷：112
• 期：15
• 页码：5703 - 5706
• 全文大小：100K
• 年卷期：v.112,no.15(April 17, 2008)
• ISSN：1932-7455

文摘

We studied the core hole screening at organic/metal interfaces using combined photoemission spectroscopy(PES) and X-ray excited Auger electron spectroscopy (XAES) as a function of the organic layer thickness.As a model system for organic semiconductor/metal interfaces, magnesium phthalocyanine was evaporatedonto gold foil. It was found that the screening of double hole final states is remarkably increased for moleculesdirectly at the interface, whereas further layers are effected very weakly. The screening mechanism is discussedin terms of both charge transfer and electronic polarization.