journal article·2021-08Open access

Organic planar diode with Cu electrode via modification of the metal surface by SAM of fluorobiphenyl based thiol

Swarup Biswas, Philippe Decorse, Hyeok Kim, Philippe Lang

Abstract

The surface of a Cu electrode is modified by the combination of preliminary oxidative treatment and grafting of a bifunctional self-assembled monolayer based on fluorobiphenylthiol (FBPS) or biphenylthiol (BPS). In these conditions, a dinaphtho [2, 3-b: 2′,3′-f] thieno [3,2-b] thiophene (DNTT)-based diode exhibits high mobility (0.35 cm 2 .V-1 .s-1) due to the formation of organized assembly of FBPS on the oxide copper that has been partially reduced in Cu 2 O; this organization controls that of the semiconductor film. On the other hand, the same treatment of Cu electrode with BPS molecules does not function, due to the disorganization of both the BPS SAM and the DNTT film. These results suggest that a monolayer of dipolar-oriented molecules lowers the injection barrier; steers the semiconductor organization and thereby enhances the performance of the derived electronic component.
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Research context

OpenAlex topics: Molecular Junctions and Nanostructures · Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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