Figure 1
From: Role of an external electric field on hybrid halide perovskite CH3NH3PbI3 band gaps
Band structure of CH3NH3PbI3, calculated by GGA + PBE without the external electric field (a), calculated by GGA + PBEsol without the external electric field (b), calculated by GGA + PBE with the external electric field 0.06 eV/Å/e (c), and calculated by GGA + PBEsol with the external electric field 0.06 eV/Å/e (d).
