Hindered amine stabilization suppresses light-induced degradation while enabling record-efficiency perovskite solar cells (IMAGE)
Caption
Hindered amine stabilization suppresses light-induced degradation while enabling record-efficiency perovskite solar cells. Schematic illustration of the hindered amine stabilization strategy (HASS) and its impact on device performance. Under illumination and oxygen exposure, photoexcited electrons in the perovskite generate superoxide radicals (O₂•⁻), which trigger decomposition into MA/FA species, I₂, and PbI₂. Incorporation of a multifunctional hindered amine scavenges these reactive radicals while simultaneously coordinating with Pb²⁺ and iodine vacancy defects, thereby blocking degradation pathways and passivating trap states. The resulting inverted perovskite solar cell achieves a champion power conversion efficiency of 26.74% (certified 26.56%), demonstrating the synergistic role of radical suppression and defect passivation in enhancing both efficiency and light stability.
Credit
Cong Chen
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.
License
CC BY-NC-ND