Electronic functionalization of the surface of organic semiconductors with self-assembled monolayers
- 18 November 2007
- journal article
- Published by Springer Nature in Nature Materials
- Vol. 7 (1) , 84-89
- https://doi.org/10.1038/nmat2059
Abstract
Self-assembled monolayers (SAMs) are widely used in a variety of emerging applications for surface modification of metals and oxides. Here, we demonstrate a new type of molecular self-assembly: the growth of organosilane SAMs at the surface of organic semiconductors. Remarkably, SAM growth results in a pronounced increase of the surface conductivity of organic materials, which can be very large for SAMs with a strong electron-withdrawing ability. For example, the conductivity induced by perfluorinated alkyl silanes in organic molecular crystals approaches 10(-5) S per square, two orders of magnitude greater than the maximum conductivity typically achieved in organic field-effect transistors. The observed large electronic effect opens new opportunities for nanoscale surface functionalization of organic semiconductors with molecular self-assembly. In particular, SAM-induced conductivity shows sensitivity to different molecular species present in the environment, which makes this system very attractive for chemical sensing applications.Keywords
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This publication has 31 references indexed in Scilit:
- Tunable Fröhlich polarons in organic single-crystal transistorsNature Materials, 2006
- High charge carrier densities and conductance maxima in single-crystal organic field-effect transistors with a polymer electrolyte gate dielectricApplied Physics Letters, 2006
- Control of threshold voltage in pentacene thin-film transistors using carrier doping at the charge-transfer interface with organic acceptorsApplied Physics Letters, 2005
- Gate Dielectrics for Organic Field‐Effect Transistors: New Opportunities for Organic ElectronicsAdvanced Materials, 2005
- Influence of the gate leakage current on the stability of organic single-crystal field-effect transistorsApplied Physics Letters, 2005
- Effects of polarized organosilane self-assembled monolayers on organic single-crystal field-effect transistorsApplied Physics Letters, 2004
- Elastomeric Transistor Stamps: Reversible Probing of Charge Transport in Organic CrystalsScience, 2004
- High-Performance Semiconducting Polythiophenes for Organic Thin-Film TransistorsJournal of the American Chemical Society, 2004
- Controlling charge injection in organic electronic devices using self-assembled monolayersApplied Physics Letters, 1997
- Ground state charge transfer in fullerene-polyalkylthiophene composites: ESR and iodine doping effectSynthetic Metals, 1996