 A new study reports a lead-free double parafskite planar heterojunction solar cell with a high-quality CS2 AG by BR6 film fabricated by low-pressure assisted-solution processing under ambient conditions, which achieves a best power conversion efficiency of 1.44%, demonstrating promise for lead-free parafskite solar cells. This article was authored by Tsuen Tsuen Wu, Chiao Huizhang, Yan Lu, and others.