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P3HT Nanofibrils Thin-Film Transistors by Adsorbing Deposition in Suspension
Shuichi Nagamatsu1, Masataka Ishida1, Shougo Miyajima2
1Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka 820-8502, Japan.
Abstract:
A novel film preparation method utilizing polymer suspension, entitled adsorbing deposition in suspensions (ADS), has been proposed. The poly(3-hexylthiophene) (P3HT) toluene solution forms P3HT nanofibrils dispersed suspension by aging. P3HT nanofibrils are highly crystallized with sharp vibronic absorption spectra. By the ADS method, only P3HT nanofibrils in suspension can be deposited on the substrate surface without any disordered fraction from the dissolved P3HT in suspension. Formed ADS film contains only the nanostructured conjugated polymer. Fabricated polymer thin-film transistor (TFT) utilizing ADS P3HT film shows good TFT performances with low off current, narrow subthreshold swing and large on/off current ratio.
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