4 December 2003 Electronic interaction at molecule-metal interfaces: implication for molecule-based electronics
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How an electron crosses a metal-molecule interface has been a longstanding question in many disciplines. The recent surge of interests in molecular electronics has renewed the need for quantitative answers to this question. In molecule-based conventional electronic devices, such as organic light emitting diodes, the metal-molecule interface determines the charge injection efficiency. The importance of the interface only increases as device dimension shrinks to the scale of a single or a small group of molecules, i.e., molecular electronics. This paper takes an experimentalist's view and discusses recent progress in understanding electron transport at metal-molecule interfaces using two-photon photoemission (2PPE) spectroscopy, which provides quantitative information on: the alignment of unoccupied molecular orbitals to the metal Fermi level, the localized nature of interfacial dipoles, the strength of interfacial electronic coupling, and the dynamics of the transient electronic state at the interface.
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Xiaoyang Zhu, Xiaoyang Zhu, "Electronic interaction at molecule-metal interfaces: implication for molecule-based electronics", Proc. SPIE 5223, Physical Chemistry of Interfaces and Nanomaterials II, (4 December 2003); doi: 10.1117/12.508022; https://doi.org/10.1117/12.508022

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