[15p-B13-1~7] 12.3 Functional Materials and Novel Devices

[15p-B13-2] Improved optical switching in diarylethene thin film transistor by interface engineering

〇Ryoma Hayakawa¹, Kenji Higashiguchi², Kenji Matsuda², Toyohiro Chikyow¹, Yutaka Wakayama^1,3 (1.NIMS, 2.Kyoto univ., 3.Kyushu univ.)

Keywords:photochromic molecules, organic field-effect transistor, Interface engineering

The development of optically-controllable organic field-effect transistors is now highly required. Although many kinds of devise structures have been proposed, the light-induced on/off ratio still remained in the range of 10-80 %. We have proposed to employ a diarylethene photochromic thin film as a transistor channel, leading to extremely high on/off ratio of more than two orders of magnitudes by light irradiation. In this talk, we present the improvement of optical switching properties by interface engineering including introduction of α-sexithiophene between source-drain electrodes and a diarylethene film and the modification of a gate insulating layer with poly(methyl methacrylate). Our work would provide a promising candidate for realizing high-performance opto-electrical devices with photochromic molecules.