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Processing Follows Function: Pushing the Formation of Self-Assembled Monolayers to High-Throughput Compatible Time Scales

Alt, Milan and Schinke, Janusz and Hillebrandt, Sabina and Hänsel, Marc and Hernandez-Sosa, Gerardo and Mechau, Norman and Glaser, Tobias and Mankel, Eric and Hamburger, Manuel and Deing, Kaja and Jaegermann, Wolfram and Pucci, Annemarie and Kowalsky, Wolfgang and Lemmer, Uli and Lovrincic, Robert (2014):
Processing Follows Function: Pushing the Formation of Self-Assembled Monolayers to High-Throughput Compatible Time Scales.
In: ACS Applied Materials & Interfaces, ACS Publications, pp. 20234-20241, 6, (22), ISSN 1944-8244, [Online-Edition: http://dx.doi.org/10.1021/am5057689],
[Article]

Abstract

Self-assembled monolayers (SAMs) of organic molecules can be used to tune interface energetics and thereby improve charge carrier injection at metal–semiconductor contacts. We investigate the compatibility of SAM formation with high-throughput processing techniques. Therefore, we examine the quality of SAMs, in terms of work function shift and chemical composition as measured with photoelectron and infrared spectroscopy and in dependency on molecular exposure during SAM formation. The functionality of the SAMs is determined by the performance increase of organic field-effect transistors upon SAM treatment of the source/drain contacts. This combined analytical and device-based approach enables us to minimize the necessary formation times via an optimization of the deposition conditions. Our findings demonstrate that SAMs composed of partially fluorinated alkanethiols can be prepared in ambient atmosphere from ethanol solution using immersion times as short as 5 s and still exhibit almost full charge injection functionality if process parameters are chosen carefully. This renders solution-processed SAMs compatible with high-throughput solution-based deposition techniques.

Item Type: Article
Erschienen: 2014
Creators: Alt, Milan and Schinke, Janusz and Hillebrandt, Sabina and Hänsel, Marc and Hernandez-Sosa, Gerardo and Mechau, Norman and Glaser, Tobias and Mankel, Eric and Hamburger, Manuel and Deing, Kaja and Jaegermann, Wolfram and Pucci, Annemarie and Kowalsky, Wolfgang and Lemmer, Uli and Lovrincic, Robert
Title: Processing Follows Function: Pushing the Formation of Self-Assembled Monolayers to High-Throughput Compatible Time Scales
Language: English
Abstract:

Self-assembled monolayers (SAMs) of organic molecules can be used to tune interface energetics and thereby improve charge carrier injection at metal–semiconductor contacts. We investigate the compatibility of SAM formation with high-throughput processing techniques. Therefore, we examine the quality of SAMs, in terms of work function shift and chemical composition as measured with photoelectron and infrared spectroscopy and in dependency on molecular exposure during SAM formation. The functionality of the SAMs is determined by the performance increase of organic field-effect transistors upon SAM treatment of the source/drain contacts. This combined analytical and device-based approach enables us to minimize the necessary formation times via an optimization of the deposition conditions. Our findings demonstrate that SAMs composed of partially fluorinated alkanethiols can be prepared in ambient atmosphere from ethanol solution using immersion times as short as 5 s and still exhibit almost full charge injection functionality if process parameters are chosen carefully. This renders solution-processed SAMs compatible with high-throughput solution-based deposition techniques.

Journal or Publication Title: ACS Applied Materials & Interfaces
Volume: 6
Number: 22
Publisher: ACS Publications
Uncontrolled Keywords: self-assembled-monolayers; functional printing; organic electronics; organic field effect transistors; photoelectron spectroscopy; infrared spectroscopy
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 26 Feb 2015 09:56
Official URL: http://dx.doi.org/10.1021/am5057689
Identification Number: doi:10.1021/am5057689
Funders: The authors acknowledge financial support via the MORPHEUS project (FKZ: 13N11701-13N11706) of the Leading-Edge Cluster Forum Organic Electronics managed by InnovationLab GmbH within the High-Tech Strategy for Germany of the Federal Ministry of Education
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