Two-dimensional (2D) metal halide perovskites exhibit efficient photoinduced emission at room temperature, but control over charge carrier transport remains limited. Here formamidinium-based layered 2D perovskites are developed with high predicted symmetry. The absence of octahedral distortion results in an exciton diffusion length of 2.5 µm.
- Jin Hou
- Jared Fletcher
- Aditya D. Mohite
