Perovskite solar cells in N-I-P structure with four layers slot-die coated

The fabrication of perovskite solar cells in an N-I-P structure with compact titanium dioxide blocking, mesoporous titanium dioxide scaffold, single step perovskite and hole transport layers deposited using the slot-die coating technique is reported. Devices on fluorine doped tin oxide coated glass substrates with evaporated gold top contacts and four slot-die coated layers reach stabilised power conversion efficiencies of 7%. This work demonstrates the suitability of slot- die coating for the production of layers within this perovskite solar cell stack and the potential to transfer to large area and roll-to-roll manufacturing processes.