Investigating the Photovoltaic Performance in ABO Structures via the Nonlinear Bond Model for an Arbitrary Incoming Light Polarization.

ABO structures commonly known as perovskite are of high importance in advanced material science due to their interesting optical properties. Applications range from tunable band gaps, high absorption coefficients, and versatile electronic properties, making them ideal for solar cells to light-emitting diodes and even photodetectors. In this work, we present, for the first time, a nonlinear phenomenological bond model analysis of second harmonic generation (SHG) in tetragonal ABO with arbitrary input light polarization.