Electronic and transport properties of porous graphenes: two-dimensional benzo- and aza-fused Π-conjugated-microporous-polymer sheets and boron–nitrogen co-doped derivatives

Authors

Zhao-Di Yang, Harbin University of Science and Technology
Wenzhi Wu, Nanjing University of Aeronautics and Astronautics
Xiao Cheng Zeng, University of Nebraska-LincolnFollow

Date of this Version

2014

Citation

J. Mater. Chem. C, 2014, 2, 2902; DOI: 10.1039/c3tc32363c

Abstract

Inspired by recent successful synthesis of porous frameworks based on aza-fused conjugatedmicroporous- polymers (Angew. Chem. Int. Ed., 2011, 50, 8753–8757), we investigate electronic and electron transport properties of two-dimensional (2D) benzo-conjugated-microporous-polymer (benzo- CMP) and aza-CMP sheets and their boron-nitrogen (BN) co-doped derivatives using density-functional theory calculations and the non-equilibrium Green's function (NEGF) method. Both benzo-CMP and aza-CMP possess pore diameters about 12 °A and both are semiconductors with a direct bandgap of 0.92 and 1.07 eV, respectively. The BN co-doped derivatives possess smaller bandgaps (0.47 to 0.6 eV). Computed current–voltage (I–V_b) curves are consistent with the semiconducting properties for all 2D systems. The tunable electronic and electron transport properties via BN co-doping offered by benzo- CMP and aza-CMP may be exploited for applications in low-dimensional electronics.