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All-Inkjet-Printed Organic Thin-Film Transistor Inverter on Flexible Plastic Substrate

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5 Author(s)
Seungjun Chung ; Department of Electrical Engineering and Computer Science and the Interuniversity Semiconductor Research Center, Seoul National University, Seoul, Korea ; Seul Ong Kim ; Soon-Ki Kwon ; Changhee Lee
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We report an all-inkjet-printed inverter using two p-type organic thin-film transistors (OTFTs) on a flexible plastic substrate. Metal-organic precursor-type silver ink, poly-4-vinylphenol solution, and 6,13-bis (triisopropylsilylethynyl)-pentacene solution were used to print gate and source/drain electrodes, gate-dielectric layer, and active semiconductor layer, respectively. By optimizing fabrication conditions, we obtained OTFTs with a mobility of 0.02 cm2/V·s, an on/off ratio of 104, and a threshold voltage of -1.2 V, and inverters with good switching performance showing a gain of 7.8 at a supply voltage of VDD = -40 V .

Published in:

IEEE Electron Device Letters  (Volume:32 ,  Issue: 8 )