High-Performance OTFTs Using Surface-Modified Alumina Dielectrics

We show novel and selective means to modify the dielectric surfaces in organic TFTs. Modification schemes include alkylphosphonic acid monolayers that have a strong affinity for alumina surfaces. Monolayers form robust, extremely uniform thin films and are deposited through simple spin-coating with...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2003-06, Vol.107 (24), p.5877-5881
Main Authors: Kelley, Tommie Wilson, Boardman, Larry D, Dunbar, Timothy D, Muyres, Dawn V, Pellerite, Mark J, Smith, Terry P
Format: Article
Language:English
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Summary:We show novel and selective means to modify the dielectric surfaces in organic TFTs. Modification schemes include alkylphosphonic acid monolayers that have a strong affinity for alumina surfaces. Monolayers form robust, extremely uniform thin films and are deposited through simple spin-coating with a dilute solution of the monolayer precursor in solvent. Adding monolayers to organic TFTs has resulted in polycrystalline devices with mobilities nearly equal to single-crystal values while maintaining acceptable values of other device parameters (for example, the threshold voltage, on/off ratio, and subthreshold slope) required for fully functional integrated circuits.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp034352e