Correlation of mobility and molecular packing in organic transistors based on cycloalkyl naphthalene diimides
作者:Tomoyuki Kakinuma、Hirotaka Kojima、Minoru Ashizawa、Hidetoshi Matsumoto、Takehiko Mori
DOI:10.1039/c3tc30920g
日期:——
A series of cycloalkyl-substituted naphthalene tetracarboxylic diimides (Cyn-NTCDIs, n = 3–8) are prepared and the transistor properties and molecular packings are systematically investigated. Cy5–Cy8-NTCDIs have similar brickwork structures, where two molecules are located on the top of a molecule with large displacement along the molecular short axis. The intermolecular overlap is maximized when the small slipping along the molecular long axis makes the molecules nearly perpendicular to the substrate. Consequently, the mobility decreases exactly in the same order as the interlayer d-spacings.
本研究制备了一系列环烷基取代的萘四羧酸二亚胺(Cyn-NTCDIs,n = 3-8),并对其晶体管特性和分子包络进行了系统研究。Cy5-Cy8-NTCDIs 具有类似的砖砌结构,其中两个分子位于一个分子的顶部,沿分子短轴有较大位移。当沿分子长轴的微小滑动使分子几乎垂直于基底时,分子间的重叠达到最大。因此,迁移率的减小顺序与层间 d 间距的减小顺序完全相同。