All‐Inorganic Perovskite Single‐Crystal Photoelectric Anisotropy

• DOI: 10.1002/adma.202204342
• Publication Date: 2022-07-27T05:40:00Z
• Authors: Shunhong Dong; Zhi‐Yi Hu; Ping Wei; Jingru Han; Zhao Wang; Jing Liu; Bao‐Lian Su; Dongyuan Zhao; Yong Liu
• Keywords: Photoelectric effect

Engineering surface structure can precisely and effectively tune the optoelectronic properties of halide perovskites, but are incredibly challenging. Herein, design fabrication uniform all-inorganic CsPbBr3 cubic/tetrahedral single-crystals reported with precise control (100) (111) anisotropy, respectively. By combining theoretical calculations, it is demonstrated that preferred engineering enables a lowest bandgap energy (2.33 eV) high-rate carrier mobility up to 241 μm2 V-1 s-1 , inherently boosting their light-harvesting carrier-transport capability. Meanwhile, polar induces ≈0.16 eV upward surface-band bending ultrahigh defect density 1.49 × 1015 cm-3 which beneficial for enhancing surface-defects-catalyzed reactions. The work highlights anisotropic perovskite devices beyond.