Publication date: 5th November 2025
Perovskite solar cells (PSCs) have recently demonstrated outstanding power conversion efficiency (PCE) surpassing 26%. Nonetheless, the intrinsic instability of lead halide perovskites (LHPs), the light-absorbing materials in PSCs, poses a significant challenge to their commercialization. A major challenge of perovskite solar cells (PSCs) lies in their intrinsic instability under harsh environmental conditions. Although extensive efforts have been made to improve stability through various additives, such approaches have typically provided only temporary benefits. To achieve long-term durability, we synthesized multifunctional dendrimers containing effective functional groups that impart self-healing capabilities and enhance the power conversion efficiency (PCE). PSCs incorporating these dendrimers achieved a PCE exceeding 25% and retained over 96% of their initial efficiency after 1000 hours under humid conditions. Remarkably, the dendrimer-based PSCs exhibited outstanding self-healing behavior, maintaining 90% of their initial PCE after ten alternating cycles of high-humidity and dry environments. The underlying self-healing mechanism was elucidated, demonstrating the crucial role of the dendrimers as self-healing agents within PSCs.
This research was supported by the Engineering Research Center (ERC), funded by the National Research Foundation of Korea (RS-2022-NR070840). This work was partly supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (Sector coupling energy industry advancement manpower training program, RS-2022-KP002703). This research was supported by Korea Basic Science Institute (National research Facilities and Equipment Center) grant funded by the Ministry of Education (RS-2024-00436346).
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