Controlling charge injection in organic field-effect transistors using self-assembled monolayers

Details Controlling charge injection in organic field-effect transistors using self-assembled monolayers Controlling charge injection in organic field-effect transistors using self-assembled monolayers

2006-05-24

arxiv.org/abs/cond-mat/0605605v1

Nano Lett. 6, 1303-1306 (2006)

Physics

Condensed Matter

Materials Science

5 pages, 2 figures. Supplementary information available upon request

Scientific paper

10.1021/nl060731i

We have studied charge injection across the metal/organic semiconductor interface in bottom-contact poly(3-hexylthiophene) (P3HT) field-effect transistors, with Au source and drain electrodes modified by self-assembled monolayers (SAMs) prior to active polymer deposition. By using the SAM to engineer the effective Au work function, we markedly affect the charge injection process. We systematically examine the contact resistivity and intrinsic channel mobility, and show that chemically increasing the injecting electrode work function significantly improves hole injection relative to untreated Au electrodes.

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