Abstract
Abstract
Molecular exchange processes in organic heterostructures are often detrimental to the performance of nano-optoelectronic devices. Bilayers of vacuum sublimed organic semiconductors on inorganic substrates can serve as reductionist model for organic–organic interfaces and the coupling strength of the template layer on the substrate is a decisive factor for possible molecular exchange. We use density-functional theory modelling and x-ray photoelectron spectroscopy to show that the coupling of the pentacene oxo-derivatives 6,13-pentacenequinone (P2O) and 5,7,12,14-pentacenetetrone (P4O) with Au(111) is weak. Consequently, as shown by ultraviolet photoelectron spectroscopy, subsequently deposited copper-phthalocyanine (CuPc) diffuses through the template layers to the Au(111) substrate.
Funder
Collaborative Innovation Centre of Suzhou Nano Science & Technology
111 Project of the Chinese State Administration of Foreign Experts Affairs
National Key R&D Programme of China
Subject
Electrochemistry,Materials Chemistry,Electrical and Electronic Engineering,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
4 articles.
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