Towards superior X-ray detection performance of two-dimensional halide perovskite crystals by adjusting the anisotropic transport behavior

Abstract

Replacing the spacer cations from BA to i-BA decreases the interlayer distance and barrier height in 2D perovskite, resulting the decrease of the degree of anisotropy. The (BA)₂CsPb₂Br₇ crystal along the <italic>ab</italic> plane exhibits superior X-ray sensitivity.