Reversible photo-switching optical functionality in two-dimensional mixed-halide hybrid perovskites
Enamul Haque, Wenxin Mao, Javier Cerrillo
Ion migration in halide perovskites is often associated with defects, irreversible processes, and structural instability, making them largely impractical for photo-switching applications. Here, we demonstrate a physical mechanism for reversible, defect-free light-induced halide-ion swapping in two-dimensional mixed-halide perovskites. We find that the …