Estudo da perovskita híbrida (PEA)₂PbI₄

Abstract

Halide perovskites have emerged as promising semiconductor materials for optoelectronic applications, such as photovoltaic devices and light-emitting diodes (LEDs). Among them, hybrid halide perovskites exhibit relevant properties, including low-cost synthesis, high charge carrier mobility, high dielectric constant, and low defect density. In this work, the crystalline structure and optoelectronic properties of the two-dimensional hybrid perovskite (PEA)₂PbI₄ were investigated by means of X-ray diffraction, diffuse reflectance spectroscopy, and photoluminescence, with the aim of determining the crystal structural parameters, the band gap energy, and the luminescence spectrum. The X-ray diffraction results indicate that the crystalline structure is triclinic, belonging to the P1. space group. Diffuse reflectance spectroscopy enabled the use of the Tauc plot method to identify a band gap energy corresponding to green light. Photoluminescence spectroscopy revealed a narrow luminescence peak in the green region.