Long-chain anionic surfactants enabling stable perovskite/silicon tandems with greatly suppressed stress corrosion

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Abstract

Despite the remarkable rise in the efficiency of perovskite-based solar cells, the stress-induced intrinsic instability of perovskite active layers is widely identified as a critical hurdle for upcoming commercialization. Herein, a long-alkyl-chain anionic surfactant additive is introduced to chemically ameliorate the perovskite crystallization kinetics via surface segregation and micellization, and physically construct a glue-like scaffold to eliminate the residual stresses. As a result, benefiting from the reduced defects, suppressed ion migration and improved energy level alignment, the corresponding unencapsulated perovskite single-junction and perovskite/silicon tandem devices exhibit impressive operational stability with 85.7% and 93.6% of their performance after 3000 h and 450 h at maximum power point tracking under continuous light illumination, providing one of the best stabilities to date under similar test conditions, respectively.

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Wang, X., Ying, Z., Zheng, J., Li, X., Zhang, Z., Xiao, C., … Ye, J. (2023). Long-chain anionic surfactants enabling stable perovskite/silicon tandems with greatly suppressed stress corrosion. Nature Communications, 14(1). https://doi.org/10.1038/s41467-023-37877-z

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