Characteristics of Halide Perovskites via Low-pressure Vapor-assisted Solution Process (LP- VASP)

The halide perovskites materials have received exceptional attention for various photonics applications due to their unique materials characteristics. In this presentation, we will show halide perovskites thin film made of low-dimension all 3D mixed structure fabricated via Low-pressure vapor-assisted solution process (LP-VASP) which demonstrated for the first to synthesis Low-dimensional and 3D mixed perovskite by vapor phase method. Their performances in photovoltaic and non-linear optical properties will be presented and discussed. Such families of hybrid organic-inorganic halide perovskite semiconductors are promising candidates for next generation photonic and applications such as solar cells, light-emitting diode, and lasing devices. The slightly 2D doped perovskite showed larger grain size and better photovoltaic performances in both power conversion efficiency and stability. For highly 2D doped perovskite thin film, we observed multiple PL emission spectra with significant multiphoton absorption characteristics, which implies the co-existence of multiple n-layered perovskites domains in one film. The nonlinear optical effects and materials properties are characterized in detail by multiphoton spectroscopy, KPFM, TR-PL, and PL mapping.