Structural Features Governing the Near-Edge X-ray Absorption Spectra of Lead Halide Perovskites

X-ray absorption spectroscopy (XAS) represents the ideal complement to diffraction techniques to investigate the structure of materials. Despite its strong points and the abundance of studies devoted to lead halide perovskites for application in optoelectronics, XAS has been applied to lead halide perovskites rather infrequently to date, and with varying degrees of success. In the search of generalizable approaches to be applied to data analysis of XAS spectra of halide perovskites with different compositions, we present here an experimental and computational study on a hybrid Pb/Bi iodide solid solution as a model for halide perovskites with different compositions.