EPFL-PVLAB and CSEM-PVcenter share perovskite deposition facilities, which aim at developing high-efficiency PSK/Si tandem solar cells. Access will be offered to the following equipment:
The infrastructure serves mainly members of both institutes and enables to process perovskite/c-Si tandems from initial c-Si wafers up until the final thin-film layers of the device and its characterisation. This infrastructure has enabled EPFL PVLAB and CSEM PVcenter to play a key role in the field of perovskite/c-Si tandems, notably by demonstrating the first tandems surpassing an efficiency of 25 % (with a fully textured design) or full-area 4-inch tandems with an efficiency above 24%. Some of the small-scale devices reaching these efficiencies also featured c-Si bottom cells textured on both sides for optimal light management, a world first. The concept was then pushed one-step further by demonstrating the first perovskite on silicon triple-junction solar cell. External users now mostly come to access metrology tools, with processing systems mainly accessed by internal users.
External users will benefit from the expertise of PVLAB and PVcenter in designing, processing and characterising high-efficiency multi-junction devices. Help with respect to experiments and stack design will include the use of in-house optical simulation tools. Processing and characterisation efforts will be focused on the use of the systems described above. Staff members of PVLAB and PVcenter will also support external users to interpret experimental data.