Efficient and Hole‐Transporting‐Layer‐Free CsPbI2Br Planar Heterojunction Perovskite Solar Cells through Rubidium Passivation

Abstract Invited for this month′s cover is the group of Jinchun Jiang at East China Normal University. The image shows a novel inorganic perovskite solar cell with rubidium‐passivated CsPbI 2 Br film and a low‐cost carbon electrode. The Full Paper itself is available at 10.1002/cssc.201802690 .