Progress in Organic Crystal Transistors for High-Performance Organic Electronics

We report our recent progresses for the maximum field-effect performances with the use of organic crystal semiconductors. Air-stable high-mobility n-type transistors are developed with single crystals of electron affine organic molecular compounds. To achieve higher device performances with p-type high-mobility organic single crystals, transistors with solid-to-liquid interfaces are structured in combination with ionic liquids. Forming the electric double layers at the boundaries of the ionic-liquid electrolyte, high-density carriers are accumulated with minimum gate voltage, so that the highest transconductance is realized. We also developed three-dimensional (3D) transistors enabling very high current density per pixel area, to prepare for realizing high-power devices with densely self-placed organic microcrystals.