 The proposed strategy involves the use of an inorganic 2-DCL-terminated T3-C2-T3-C2-C-Lex, emzine to reduce the lattice strain in the CSBBBR3-paravskite layer. This results in a compressed and confined-paravskite lattice, which is stabilized by the PB-BACKslash-UF8-FFCL bonds and the 2-DT3-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 Paravskite 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, Jialong Duan, Jian Du, and others.