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A Soluble Dynamic Complex Strategy for the Solution‐Processed Fabrication of Organic Thin‐Film Transistors of a Boron‐Containing Polycyclic Aromatic Hydrocarbon
Authors:Kyohei Matsuo  Dr Shohei Saito  Prof?Dr Shigehiro Yamaguchi
Institution:1. Department of Chemistry, Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya, Japan;2. Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan;3. Institute of Transformative Bio-Molecules (WPI-ITbM) and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya, Japan
Abstract:The solution‐processed fabrication of thin films of organic semiconductors enables the production of cost‐effective, large‐area organic electronic devices under mild conditions. The formation/dissociation of a dynamic B?N coordination bond can be used for the solution‐processed fabrication of semiconducting films of polycyclic aromatic hydrocarbon (PAH) materials. The poor solubility of a boron‐containing PAH in chloroform, toluene, and chlorobenzene was significantly improved by addition of minor amounts (1 wt % of solvent) of pyridine derivatives, as their coordination to the boron atom suppresses the inherent propensity of the PAHs to form π‐stacks. Spin‐coating solutions of the thus formed Lewis acid–base complexes resulted in the formation of amorphous thin films, which could be converted into polycrystalline films of the boron‐containing PAH upon thermal annealing. Organic thin‐film transistors prepared by this solution process displayed typical p‐type characteristics.
Keywords:boron  Lewis acid–  base complexes  organic semiconductors  polycyclic aromatic hydrocarbons  solubility modulation
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