Xi‐Cheng Ai

In Situ Surface Reconstruction of CsPbI3 Perovskite Films for Enhanced Phase Stability and Photovoltaic Performance

Abstract The small ionic radius of Cs+ results in a low tolerance factor for CsPbI3 perovskite, which intrinsically triggers its spontaneous phase transition from black phase to yellow phase, severely limiting the power conversion efficiency and long-term stability of CsPbI3 pero...