Extended Data Fig. 7: Rear reflector contact optimization.
From: Enhanced optoelectronic coupling for perovskite/silicon tandem solar cells
a, Statistical distribution of the device characteristics of the perovskite/silicon tandem cells with various rear IZO thicknesses. Perovskite processing conditions are identical and fabricated within the same batch. However, the bottom cells are from different batches and we assign the change of the FF and Voc to the variations in the quality of the bottom cell. b, Simulation results for the ideal thickness of the rear MgF2 thicknesses. After 150 nm, the reflectance does not change substantially. c, Photograph of the rear side of tandem cells (including silver layers) with and without rear reflectors.
