Dataset for magneto-optical spectroscopy of benzotriazole-based ammonium cation and its difluorinated derivative

Dataset for scientific publication entitled: Engineering the Effective Mass in 2D Perovskites via Octahedral Distortion. This dataset includes raw photoluminescence excitation spectroscopy and reflectivity spectra of a single crystal- BTA2PbI4 and (F2BTa)2PbI4. The reflectivity spectra were measured in a pulsed magnetic field up to 90T. The values of the magnetic field in each acquisition frame of a given pulse are reported in the corresponding *.dat file. In this file, the three columns relate to the value of the field at the beginning of the acquisition, at the end of the acquisition, and to the magnetic field value averaged over the duration of the acquisition frame.