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 .