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Issue 35, 2016
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Self-forming electrode modification in organic field-effect transistors

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We report on self-forming electrode modification by mixing 2,3,4,5,6-pentafluorothiophenol (PFBT) directly into the solution of the organic semiconductor prior to film formation on top of existing metal electrodes. During the formation of the semiconductor layer from the mixed solution, PFBT chemisorbs on the underlying source/drain electrodes and modifies their electronic properties. The modification of evaporated silver, gold, or printed silver electrodes with PFBT is analyzed by X-ray photoelectron spectroscopy. The use of this self-forming electrode modification is applied to solution-processed p-channel top-gate 6,13-bis(triisopropylsilylethynyl)pentacene/poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] organic field-effect transistors (OFETs) that comprise bare silver or gold source/drain electrodes. The proposed new method simplifies device fabrication while yielding OFETs with a performance level that is comparable to that of reference devices in which the metal electrodes are modified with PFBT prior to the fabrication of the semiconductor layer.

Graphical abstract: Self-forming electrode modification in organic field-effect transistors

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Publication details

The article was received on 16 May 2016, accepted on 10 Aug 2016 and first published on 10 Aug 2016

Article type: Paper
DOI: 10.1039/C6TC02028C
Citation: J. Mater. Chem. C, 2016,4, 8297-8303

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    Self-forming electrode modification in organic field-effect transistors

    S. Choi, F. A. Larrain, C. Wang, C. Fuentes-Hernandez, W. Chou and B. Kippelen, J. Mater. Chem. C, 2016, 4, 8297
    DOI: 10.1039/C6TC02028C

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