Air-stable CsPb1−xBixBr3 (0 < x < 1) perovskite crystals: optoelectronic and photostriction properties
The growth of single crystals allows more accurate and reliable study the intrinsic electrical and optical properties of halide perovskite materials. However, all-inorganic halide perovskites single crystals are difficult to prepare due to poor solubility of the reactant precursors. In this paper, we report a series of air-stable Cs-based halide perovskite single crystals, CsPbBr3 and CsPb1−xBixBr3 (x < 1 ), prepared via a modified antisolvent vapour-assisted crystallization method. The Cs-based halide perovskites exhibited low trap density and high carrier mobility that comparable to those of organic-inorganic hybrid halide perovskite materials. Most importantly, the Bi-dopped CsPb1−xBixBr3 perovskites also indicated excellent light absorption (covering the entire visible wavelengthen) and photostriction (effective photostriction of about 8*10-4) performances, which greatly expands the optoelectronic and opto-mechanical applications of these inorganic halide perovskite materials.