Heterojunction engineering for improving perovskite solar cell performance

In the wave of renewable energy replacing fossil energy, perovskite solar cells (PSCs) have emerged. In recent work by X. Sun et al., perovskite devices built by precisely controlling the thermal annealing process achieved a large open-circuit voltage (1.23 V) and power-conversion-efficiency up to 20.32%. This study sheds new light on junction engineering strategies to enhance the performance of PSCs.