Ink based preparation of chalcogenide perovskites as thin films for PV applications The increasing demand for energy in the current technological era and the recent political decisions about giving up on nuclear energy diverted humanity to focus on alternative environmentally friendly energy sources like solar energy. Although silicon solar cells are the product of a matured technology the search for highly efficient and easily applicable materials is still ongoing. These properties made the efficiency of halide perovskites comparable with silicon solar cells for single junctions within a decade of research. However the downside of halide perovskites are poor stability and lead toxicity for the most stable ones. On the other hand chalcogenide perovskites are one of the most promising absorber materials for the photovoltaic market due to their elemental abundance and chemical stability against moisture and oxygen. In the search of the ultimate solar absorber material combining the good optoelectronic properties of halide perovskites with the stability of chalcogenides could be the promising candidate. Thus ...