Research data for: Halide remixing under device operation imparts stability on mixed-cation mixed-halide perovskite solar cells

This entry contains the data required to reproduce the figures from the main text of the associated manuscript. This includes: - GIWAXS diffractograms (calibrated, processed, and extracted to a readily-readable format) and relative extracted peak positions - current vs time data - current vs voltage data - photoluminescence spectra (wavelength-dependent, and eV-dependent) and relative peak positions.