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 BTT as the functionalized core. The well-defined 2D structure of BTT-GDY with a unique pore was well characterized by selected area electron diffraction 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 cm ² V ⁻¹ S ⁻¹ and 3.35 × 10 ⁻² cm ² V ⁻¹ S ⁻¹ by the space-charge-limited-current method.