Efficient All-Solution-Processed Perovskite Light-Emitting Diodes via a Room-Temperature Vapor-Treated Interlayer.

Metal halide perovskites hold great promise for cost-effective, solution-processed, light-emitting diodes (LEDs) due to their exceptional optoelectronic properties. However, fabricating all-solution-processed perovskite LEDs (PeLEDs) remains challenging because the perovskite emitters are susceptible to damage from subsequent solution layers. Here, we introduce a novel fabrication method that employs a low-pressure-treated electron-transport layer (ETL) at room temperature, complemented by a polyethylenimine (PEI) interface modification layer.

Role of Edge Reconstruction in the Synthesis of Few-Layer Black Phosphorene.

Recent advancements in preparing few-layer black phosphorene (BP) are hindered by edge reconstruction challenges. Our previous studies have revealed the factors contributing to the difficulty of growing few-layer BP. In this study, we have successfully identified three reconstructed edges in bi- and multilayer BP through a combination of the crystal structure analysis by particle swarm optimization (CALYPSO) global structure search and density functional theory (DFT).