Efficient planar perovskite solar cells using room-temperature vacuum-processed C60 electron selective layers
Efficient organic–inorganic lead halide perovskite solar cells with regular structure typically use solution-processed electron selective layers. Here, we demonstrated efficient planar perovskite solar cells using vacuum-processed C60 compact electron selective layers at room temperature. The best-performing planar perovskite solar cell has shown a power conversion efficiency of 15.14% with an open circuit voltage of 1.08 V and a fill factor of 74.51% measured under reverse voltage scanning. Our results suggest that vacuum-processed fullerene electron selective layer is a good candidate for fabricating all perovskite tandem solar cells.