ORGANIC THIN FILM TRANSISTORS INCLUDING METAL OXIDE NANOPARTICLES WITHIN A PHOTOCURABLE TRANSPARENT POLYMER GATE INSULATOR LAYER AND METHOD FOR FABRICATING THE SAME BY USING SOL-GEL AND PHOTOCURING REACTIONS
First Claim
1. An organic thin film transistor comprising a substrate, a gate electrode layer formed on said substrate, a photocurable transparent inorganic/polymer composite layer including metal oxide nanoparticles formed on said substrate and gate electrode, an organic activation layer formed on said composite layer and a source-drain electrode layer formed on said activation layer,wherein the photocurable transparent inorganic/polymer composite layer including metal oxide nanoparticles is prepared to exhibit dielectric properties by mixing a metal oxide precursor and a photocurable transparent polymer, coating the mixture on the substrate and gate electrode to form an organic film, and converting a part of the organic film into nano-inorganic particles through sol-gel and photocuring reactions.
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Abstract
The present invention relates to an organic thin film transistor comprising a photocurable transparent inorganic/polymer composite layer as a gate insulator layer in which metal oxide nanoparticles are generated within a photocurable transparent polymer through sol-gel and photocuring reactions and whose permittivity is easily regulated; and a fabrication method thereof. Since the organic thin film transistor according to the present invention utilizes the photocurable transparent inorganic/polymer composite layer showing a significantly high and readily controllable permittivity as a gate insulator, it is capable of operating under low voltage conditions and has a high on/off current ratio due to low leakage current. Further, the organic thin film transistor according to the present invention preserves the unique properties of the photocurable transparent polymer, enabling the formation of a photocurable micropattern of a gate insulator having high processibility
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23 Claims
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1. An organic thin film transistor comprising a substrate, a gate electrode layer formed on said substrate, a photocurable transparent inorganic/polymer composite layer including metal oxide nanoparticles formed on said substrate and gate electrode, an organic activation layer formed on said composite layer and a source-drain electrode layer formed on said activation layer,
wherein the photocurable transparent inorganic/polymer composite layer including metal oxide nanoparticles is prepared to exhibit dielectric properties by mixing a metal oxide precursor and a photocurable transparent polymer, coating the mixture on the substrate and gate electrode to form an organic film, and converting a part of the organic film into nano-inorganic particles through sol-gel and photocuring reactions.
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