Diammonium Molecular Configuration‐Induced Regulation of Crystal Orientation and Carrier Dynamics for Highly Efficient and Stable 2D/3D Perovskite Solar Cells
A methylamine-gas-mediated perovskite precursor resulted in high-quality MAPbI3 films featuring a (110) preferred crystal orientation. Planar PSC devices fabricated using the MA-gas-mediated precursor showed a high efficiency of 19.28%.