Projects

Metal halide Perovskite solar cells have emerged as promising semiconductor devices for next generation photovoltaics. Remarkably, the power conversion efficiency of single junction solar cells has reached >22% within 6 years. Efficient tandem solar cells based on perovskites have also recently been achieved. However, almost all reported high-efficiency devices have small active areas, typically around 0.1 cm^2. Upscaling of single junction and tandem perovskite solar cells are required for successful manufacturing and commercialization, but is challenging. In the proposed project, large-area perovskite solar cells will be designed based on our recent understanding of perovskite opto-electronics and device physics. Photon absorption within a complex multilayer (tandem) devices will be optimized using a transfer matrix approach and the effect of parasitic resistance (sheet and shunt resistance) will be modelled prior to fabricating real devices. Large-area perovskite cells will be fabricated by thermal co-evaporation, which offers uniform perovskite films with few pin-holes and shows the potential for solar cell manufacturing.