Heteroacene derivative, the organic semiconductor layer, and an organic thin film transistor

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PROBLEM TO BE SOLVED : To provide a novel heteroacene derivative which is a coating type organic semiconductor material having high carrier mobility, high thermostability and high solubility, and an organic semiconductor layer and an organic thin film transistor using the same.SOLUTION : There are provided a heteroacene derivative represented by the formula (1) [dithienobenzothiophene, dithienobenzodifuran and difluobenzodifuran] and an organic semiconductor layer and an organic thin film transistor using the same. (1), where Rand Rare a C1 to 20 hydrocarbon group, Rand Rare H or a C1 to 20 hydrocarbon group, Rand Rare H or a C1 to 20 hydrocarbon group or a C1 to 20 hydrocarbon group containing silicon, Tto Tare S or O, X is O or S, n and l is an integer of 1 to 20 and m in each section of l is an integer of 1 to 10.