P3HT Nanofibrils Thin-Film Transistors by Adsorbing Deposition in Suspension

Shuichi Nagamatsu; Masataka Ishida; Shougo Miyajima; Shyam S Pandey

doi:10.3390/ma12213643

P3HT Nanofibrils Thin-Film Transistors by Adsorbing Deposition in Suspension

Materials (Basel). 2019 Nov 5;12(21):3643. doi: 10.3390/ma12213643.

Authors

Shuichi Nagamatsu¹, Masataka Ishida¹, Shougo Miyajima², Shyam S Pandey²

Affiliations

¹ Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka 820-8502, Japan.
² Graduate School of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu 808-0196, 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.

Keywords: nanofibrils; poly(3-hexylthiophene); suspension; thin-film transistors.