Chemisorption,Morphology, and Structure of a n‐Type Perylene Diimide Derivative at the Interface with Gold: Influence on Devices from Thin Films to Single Molecules |
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| Authors: | Francesca Ciccullo Sabine‐Antonia Savu Dr Andrea Gerbi Maximilian Bauer Dr Ruslan Ovsyannikov Antonio Cassinese Prof Thomas Chassé Dr Maria Benedetta Casu |
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| Institution: | 1. CNR‐SPIN and Department of Physics Science, University of Naples Federico II, Piazzale Tecchio, 80125 Naples (Italy);2. Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen (Germany);3. CNR‐SPIN, Corso Perrone 24, 16152 Genoa (Italy);4. Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, Albert‐Einstein‐Str. 15, 12489 Berlin (Germany) |
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| Abstract: | We have investigated thin films of a perylene diimide derivative with a cyano‐functionalized core (PDI‐8CN2) deposited on Au(111) single crystals from the monolayer to the multilayer regime. We found that PDI‐8CN2 is chemisorbed on gold. The molecules experience a thickness‐dependent reorientation, and a 2D growth mode with molecular stepped terraces is achieved adopting low deposition rates. The obtained results are discussed in terms of their impact on field effect devices, also clarifying why the use of substrate/contact treatments, decoupling PDI‐8CN2 molecules from the substrate/contacts, is beneficial for such devices. Our results also suggest that perylene diimide derivatives with CN bay‐functionalization are very promising candidates for single‐molecule electronic devices. |
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| Keywords: | chemisorption organic electronics surface chemistry thin film growth X‐ray absorption spectroscopy |
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