Dataset for S Maniyarasu et al. "Role of alkali cations in stabilizing mixed-cation perovskites to thermal stress and moisture conditions"

Dataset for S Maniyarasu et al., "Role of alkali cations in stabilizing mixed-cation perovskites to thermal stress and moisture conditions" - photoelectron spectroscopy (PES) data, using near ambient pressure and hard x-ray PES, as well as additional characterisation work such as absorption spectrocopy and photoluminescence spectroscopy