Mitigating ion migration in perovskite solar cells

Intrinsic ion migration in the metal halide perovskite (MHP) absorber layer and its interfaces seriously limits the device stability of perovskite solar cells (PSCs). Despite considerable efforts to mitigate the ion migration issue, it remains a formi-dable challenge in the commercialization of PSCs. Here, we provide a short review of the device failure mechanisms induced by intrinsic ion migration and discuss the detrimental effects of ion migration on the different component layers of PSCs. We outline the corresponding strategies to mitigate ion migration in PSCs and provide an insight on materials engineering to attain long-term stabilized perovskite photo-voltaics (PVs). high power conversion efficiencies and low projected manufacturing costs [1,2]. Despite all the promises, the short lifetime of PSCs is still the major obstacle towards commercialization. In the past few years, the degradation of PSCs caused by extrinsic factors (e.g., light, heat, moisture, oxygen) have been intensively studied and significantly relieved by engineering of the perovskite and interlayer materials and the application of encapsulation [3-5 ]. However, the intrinsic

Automated summary

Intrinsic ion migration in metal halide perovskite absorber layers and interfaces severely limits the device stability of perovskite solar cells. Efforts to mitigate this issue have been made, but it remains a formidable challenge in commercializing PSCs. While degradation of PSCs caused by extrinsic factors has been studied and relieved to some extent, intrinsic ion migration remains a major obstacle to commercialization.