In the last few years, the development of perovskite solar cells (PSC) has attracted particular attention, today the record power conversion efficiency (PCE) exceeds 25% . The investigation of new materials and processes for efficient, environmentally friendly and cost-effective solar cells is of great importance for the further development of the technology. A remaining challenge of the commercial viability of perovskite solar cells are their limited stability relative to established technologies. Previous work has indicated that replacing the organic charge transport layers (CTL) with inorganic ones can help to improve device stability [2,3]. However, the allowable materials are restricted by the standard processing methods for PSC. Because the layers are thin-films and therefore not self-supporting, the devices are typically produced via sequential layer deposition onto a supporting substrate. This method restricts the choice of materials, since each layer deposition must preserve the already processed layers, avoiding damage from typically sources such as incompatible solvents or overheating.