[15a-302-1~10] 12.4 Organic light-emitting devices and organic transistors

[15a-302-6] [JSAP Young Scientist Award Speech] Large-Area Single-Bilayer Organic Semiconductor Ultrathin Films Achieved via Interlayer Frustration and its Application into Thin-Film Transistors

〇Shunto Arai^1,2, Satoru Inoue^2,3, Takamasa Hamai^1,2, Hiromi Minemawari², Reiji Kumai⁴, Tatsuo Hasegawa^1,2 (1.Univ. of Tokyo, 2.AIST FLEC, 3.Nippon Kayaku, 4.KEK)

Keywords:Organic electronics, bilayer, Thin film transistor

Molecular bilayer is known as a crucial component of soft matters such as lipids or cell membranes, which being of great fundamental interests in many fields of science. In most cases, bilayer films are produced by asymmetric amphiphilic molecules composed of a hydrophilic head and a hydrophobic tail. These molecules spontaneously form molecular bilayers in the solvent to reduce the interface tension. The crucial characteristic of the molecular bilayers is the high flexibility which stems from the ultrathin nature of the films. Recently we found that asymmetrically-substituted organic semiconductor molecules exhibit highly layered crystallinity due to the bilayer-type crystal structures. However, molecular-level thickness control or single bilayer formation has never been reported so far, although its importance to the application to the flexible electronics devices. Here, we report a method to produce ultrathin single bilayers achieved via inter-layer frustration which allow us to control the thickness at a molecular level.