Preparation of crystalline benzotrithiophene-based two-dimensional graphdiyne analogue

Abstract

We report a crystalline two-dimensional (2D) benzotrithiophene-based graphdiyne (BTT-GDY), which features diacetylene as linkages and benzotrithiophene as the functionalized core. The well-defined 2D structure of BTT-GDY with a unique pore was well characterized by selected area electron diffraction (SAED) due to its good crystallinity. BTT-GDY films show some semiconductor characteristics including a bandgap of 2.38 eV, the conductivity of 2×10-3 S m-1 at room temperature. The hole mobility and the electron mobility of BTT-GDY films were determined to be 2.34 cm2 V-1 S-1 and 3.35×10-2 cm2 V-1 S-1 by the Space-Charge-Limited-Current (SCLC) method.