The project is intended to research the influence of microstructure of grain boundaries on the radiative recombination activities of Cu(In,Ga)S2 solar cells. Two microscopy techniques were used, cathodoluminescence (CL) and electron backscatter diffraction (EBSD). The CL data was acquired by an Attolight Allalin 4027 Chronos dedicated CL-SEM with a 150 l/mm and 700 nm blazed grating. All CL maps were acquired with 3 kV beam energy, 1.25 nA measurement current, and 50 µm aperture size. The CL data was processed by the python library Lumispy. An indepth tutorial in how to use Lumispy can be found here: https://docs.lumispy.org/en/latest/ EBSD data was measured by a Zeiss GeminiSEM equipped with Oxford Instruments HKL Symmetry S3 detector. The software used in data acquisition is AZtec 4.0. The stepsize of maps is 30 µm and the phase for indexing is cubic zinc blende phase. The data was processed and analysed by MTEX, and open-sourced Matlab toolbox. All measurements were done at room temperature.