Japan Science and Technology Agency

Dic Corporation

Tokyo Institute of Technology

Jun-ichi Hanna

Tetsuo Kusumoto

Yoshio Aoki

Yoshinobu Sakurai

Atsuhisa Miyawaki

Aya Ishizuka

Yasuyuki Watanabe

Hiroaki Iino

Keiji Tokunaga

An organic material having at least one aromatic conjugated π-electron system is selected. The purity of the organic material is improved by purification, and a conduction mechanism of the organic material is confirmed by a time-of-flight method, whereby a liquid phase of the organic material is usable as an organic semiconductor. A method that enables the usage of a liquid phase of an organic material as an organic semiconductor is provided. The method involves confirming the electronic conduction of the organic material having at least one aromatic conjugated π-electron system by evaluation of a charge transport property using a time-of-flight method, and by evaluation of a dilution effect caused by addition of a diluent.

Liquid organic semiconductor material

The present invention, the present invention relates to an organic semiconductor material having a benzothienobenzothiophene skeleton, an organic semiconductor ink containing the organic semiconductor material, and an organic transistor using the organic semiconductor material. An object of the present invention is to provide an organic semiconductor material that easily provides a film having a high carrier mobility without the need for a complicated process. It was found that a BTBT derivative having a particular arylene acetylene structure is crystallized by way of a high-order liquid crystal phase having a highly ordered molecular arrangement, and thus the BTBT derivative easily forms a film having a high mobility without requiring complicated heat treatment even when the film is formed by printing. This finding led to the achievement of the object.

Benzothienobenzothiophene derivative, organic semiconductor material, and organic transistor

Growing community of inventors

Tokyo, Japan

Jun-ichi Hanna