Electronic and optical properties of the wurtzite-ZnO/CH3NH3PbI3 interface: first-principles calculations

Abstract

The atomistic geometry, binding energy, optical and electronic properties of wurtzite-ZnO (WZ-ZnO) (100)/CH3NH3PbI3 (MAPbI3) (112) interface were studied with the first-principles calculations. The lattice mismatch of this interface is 8.9%, and the interface binding energy is −0.164 J/m2. Interface states appear nearby the Fermi level, which come from the contribution of O-2p orbital, I-5p orbital and Pb-6s orbital. The atom orbitals of WZ-ZnO (100)/MAPbI3 (112) interface have hybridizations. Through the analysis of charge density difference and Bader atomic charges, it is found that there is obvious charge transfer at the interface.