Highly tunable properties in pressure-treated two-dimensional Dion–Jacobson perovskites
Lingping Kong, Gang Liu, Jue Gong, Lingling Mao, Mengting Chen, Qingyang Hu, Xujie Lü, Wenge Yang, Mercouri G. Kanatzidis, Ho‐kwang Mao
Abstract
Significance Two-dimensional Dion–Jacobson (2D D-J) lead-halide perovskite is a cutting-edge material paradigm that has realized high-efficiency photovoltaic applications and synergetic chemical stability. With the addition of the pressure dimension, this material provides a crucial platform for studying both pressure-tailored physical properties and pressure-driven novel phenomena. Here, we demonstrate that 2D D-J perovskites experience various transitions under pressure, such as crystalline-amorphous and 2D–three-dimensional structural transformation, and the probable metallization are strongly suggested. Moreover, the fundamental changes in the material properties are observed at ambient conditions after pressure treatment, which is crucial for achieving the desired characteristics for viable applications.