期刊
NANO LETTERS
卷 10, 期 11, 页码 4369-4374出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl101874k
关键词
Work-function modification; Fermi-level pinning; molecular dipoles; interfaces; metal-organic; self-assembled monolayers; organic electronics; molecular electronics
类别
资金
- FMF [P20972-N20]
Deposition of monolayers of strong electron donors or acceptors on metal surfaces in many cases results in a metal-independent work function as a consequence of Fermi-level pinning. This raises the question whether in such a situation molecular dipoles, which are also frequently used to tune the interface energetics, still can have any impact. We use density functional theory to show that the spatial position of the dipoles is the determining factor and that only dipoles outside the immediate metal molecule interface allow work-function changes beyond the pinning limit.
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