ORGANIC THIN FILM TRANSISTOR, ORGANIC SEMICONDUCTOR THIN FILM, AND ORGANIC SEMICONDUCTOR MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an organic thin film transistor which has a high carrier mobility, and suffers a small change in threshold voltage even after having been driven repeatedly.SOLUTION: An organic thin film transistor comprises a semiconductor active layer including a compound expressed by the general formula (1). {X is a sulfur or oxygen atom; Z is a substituent group having a length of 3.7 Å or shorter from a nitrogen atom to an end; Rto Rare each a hydrogen atom or a substituent group, provided that at least one of Rto Ris a substituent group expressed by the general formula (W); L is a particular divalent coupling group; and R is a substituted or unsubstituted alkyl group (the total number of carbon atoms of the alkyl group included in -L-R is 4 or more) having a particular number or more of carbon atoms, an oligooxyethylene group in which the number v of times an oxyethylene unit is repeated is 2 or larger, an oligosiloxane group having two or more silicon atoms, or a substituted or unsubstituted trialkylsilyl group.}