Abstract

We introduce the field of organic molecular beam deposition (OMBD) with emphasis on the particular importance of interfaces and the first molecular layer. With respect to the content of this book, we point out some general features that distinguish organic systems from inorganic systems, such as the different interaction potentials and the internal degrees of freedom of organic molecules. We then focus on well-defined systems, i.e. model molecules on single-crystal substrates, prepared under optimised conditions in ultrahigh vacuum by sublimation techniques. We discuss selected case studies, covering examples from organic semiconductors, namely 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA), 1,4,5,8-naphthalene-tetracarboxylic-dianhydride (NTCDA), Sn-phthalocyanine (SnPc), (perfluoro-) pentacene and diindeno-perylene. The main aspects concern the bonding and the electronic structure at the interface, the molecular orientation, the interface ordering and the growth properties of thin films.

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