Nonlinear optical properties of lead halide perovskites

Recently, lead halide perovskites are attracting much attention as excellent optical materials for thin film solar cells, light-emitting diodes, lasers, and optical switches. Besides their optical properties suitable for these optoelectronic devices, the lead halide perovskites also possess unique nonlinear optical properties. In this invited paper, we summarize our recent studies on the nonlinear optical properties of lead halide perovskites, which provide deep insights into the photophysics of lead halide perovskites.