The study addresses the challenges of polarity mismatch and residual strain in inverted perovskite solar cells (PSCs) by proposing a multifunctional hybrid pre-embedding strategy. The strategy involves using a binary hybrid system of organic polyelectrolyte (PFN-Br) and imidazolium salts (IAI) to improve substrate wettability and address unfavorable strain and heterogeneities at the buried interface. By exposing the buried interface, the residual strain of the perovskite films was significantly reduced due to the presence of organic polyelectrolyte and imidazolium salt, which also facilitated halogen compensation and coordinated Pb4+. This resulted in improved carrier transport and reduced defect recombination. The optimized inverted PSCs achieved a power conversion efficiency (PCE) of 21.93% for perovskite with a 1.62 eV bandgap and 23.74% for RbCsFAMA-based perovskite with a 1.55 eV bandgap, demonstrating enhanced performance and stability. The coembedding strategy effectively reduced defect states and nonradiative recombination, leading to superior device efficiency and endurance.The study addresses the challenges of polarity mismatch and residual strain in inverted perovskite solar cells (PSCs) by proposing a multifunctional hybrid pre-embedding strategy. The strategy involves using a binary hybrid system of organic polyelectrolyte (PFN-Br) and imidazolium salts (IAI) to improve substrate wettability and address unfavorable strain and heterogeneities at the buried interface. By exposing the buried interface, the residual strain of the perovskite films was significantly reduced due to the presence of organic polyelectrolyte and imidazolium salt, which also facilitated halogen compensation and coordinated Pb4+. This resulted in improved carrier transport and reduced defect recombination. The optimized inverted PSCs achieved a power conversion efficiency (PCE) of 21.93% for perovskite with a 1.62 eV bandgap and 23.74% for RbCsFAMA-based perovskite with a 1.55 eV bandgap, demonstrating enhanced performance and stability. The coembedding strategy effectively reduced defect states and nonradiative recombination, leading to superior device efficiency and endurance.