Photoremixing of Photosegregated Formamidinium/Cesium Lead Iodide/Bromide Thin Films under Pulsed Laser Excitation

Robust and reproducible photoremixing of photosegregated, mixed-halide perovskite thin films is observed under pulsed laser excitation. This paves the way to develop a more comprehensive understanding of perovskite photoinstabilities.