Cesium lead bromide perovskite nanocrystals synthesized supersaturated recrystallization at room temperature: comparison of one-step and two-step processes.

Over more than a decade, lead halide perovskites (LHPs) have been popular as a next-generation semiconductor for optoelectronics. Later, all-inorganic CsPbX (X = Cl, Br, and I) nanocrystals (NCs) were synthesized supersaturated recrystallization (SR) at room temperature (RT). However, compared to the hot injection (HI) method, the formation mechanism of NCs SR-RT has not been well studied.

Phase Behavior and Role of Organic Additives for Self-Doped CsPbI Perovskite Semiconductor Thin Films.

The phase change of all-inorganic cesium lead halide (CsPbI) thin film from yellow δ-phase to black γ-/α-phase has been a topic of interest in the perovskite optoelectronics field. Here, the main focus is how to secure a black perovskite phase by avoiding a yellow one. In this work, we fabricated a self-doped CsPbI thin film by incorporating an excess cesium iodide (CsI) into the perovskite precursor solution.