 The proposed strategy involves the use of an inorganic 2D-CL terminated T3-C2, T3-C2-CLX, emzine to reduce the lattice strain in the CSPBBR3 perovskite layer. This results in a compressed and confined perovskite lattice, which is stabilized by the PB-Baxlash UF8FFCL bonds and the 2D-T3-C2 immobilizing the lattice. Additionally, the defective surface is healed, resulting in a champion efficiency of 11.08%, which is the highest reported efficiency for this type of perovskite solar cell. Furthermore, the unencapsulated device demonstrated nearly unchanged performance under 80% relative humidity and 85 degrees Celsius for 100 days and 30 days respectively. This article was authored by Ching Weizhou, Jelong Duan, Jendu, and others.