We developed a solvent-free transfer-printing process for organic semiconductor thin films combining a polymer transfer-printing plate and annealing. This process exploited the isotropic liquid phase of a naphthalene tetracarboxylic acid diimide derivative substituted at the N and N′ positions with ditridecyl alkyl chains (C13). The developed process used the material efficiently; for example, it required less than 0.01 mg of C13 powder to cover an area of ca. 1 cm². The resulting films were thin (thickness of ∼80 nm), uniform, and highly crystalline. The maximum electron mobility of thin-film transistors containing the C13 thin films reached 0.3 cm²/V. This process offers a new route to prepare highly crystalline organic semiconductor thin films without using any harmful solvents.

我们开发了一种无溶剂转移印刷工艺，该工艺结合了聚合物转移印刷板和退火技术，用于有机半导体薄膜。该方法利用了在N和N'位置被双十三烷基烷基链（C13）取代的萘四甲酸二酰亚胺衍生物的各向同性液相。开发的过程有效地利用了材料；例如，它需要少于0.01 mg的C13粉末才能覆盖约200毫米的面积。1厘米²。所得的薄膜很薄（厚度约80 nm），均匀且高度结晶。包含C13薄膜的薄膜晶体管的最大电子迁移率达到0.3cm ² / V。该方法提供了制备高度结晶的有机半导体薄膜而不使用任何有害溶剂的新途径。