This .rar file contains the experimental data related to the excitonic and multiexcitonic dynamics of perovskite quantum dots with 12 and 26 facets. The archive also includes the photoluminescence (PL) and absorbance data for each of the samples investigated in this project. In addition, the file provides datasets associated with optical gain measurements, including amplified spontaneous emission (ASE) and transient absorption spectroscopy.