Energy level alignment at metal-octaethylporphyrin interfaces

被引：15

作者：

Alkauskas, A

Ramoino, L

Schintke, S

von Arx, M

Baratoff, A

Güntherodt, HJ

Jung, TA

机构：

[1] Univ Basel, Inst Phys, NCCR Nanoscale Sci, CH-4056 Basel, Switzerland

[2] Paul Scherrer Inst, Lab Micro & Nanotechnol, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 49期

关键词：

D O I：

10.1021/jp054325j

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 studied the electronic structure of copper-octaethylporphyrin (CuEOP) adsorbed on three metal surfaces - Ag(001), Ag(111), and Cu(111)-by means of ultraviolet photoelectron spectroscopy (UPS). The adsorption-induced work function shifts saturate roughly beyond two monolayers. The saturation values are substrate dependent, negative, and range from -1.30 to -0.85 eV. This shift is larger than that for tetraphenylporphyrins. The two highest occupied molecular orbitals (HOMO and HOMO-1) of the organic are clearly resolved in the UPS spectra. The origin of the negative work function shift is discussed.

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收藏

页码：23558 / 23563

页数：6

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