Silver coordination-induced n-doping of PCBM for stable and efficient inverted perovskite solar cells

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Abstract

The bidirectional migration of halides and silver causes irreversible chemical corrosion to the electrodes and perovskite layer, affecting long-term operation stability of perovskite solar cells. Here we propose a silver coordination-induced n-doping of [6,6]-phenyl-C61-butyric acid methyl ester strategy to safeguard Ag electrode against corrosion and impede the migration of iodine within the PSCs. Meanwhile, the coordination between DCBP and silver induces n-doping in the PCBM layer, accelerating electron extraction from the perovskite layer. The resultant PSCs demonstrate an efficiency of 26.03% (certified 25.51%) with a minimal non-radiative voltage loss of 126 mV. The PCE of resulting devices retain 95% of their initial value after 2500 h of continuous maximum power point tracking under one-sun irradiation, and > 90% of their initial value even after 1500 h of accelerated aging at 85 °C and 85% relative humidity.

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Gong, C., Li, H., Wang, H., Zhang, C., Zhuang, Q., Wang, A., … Zang, Z. (2024). Silver coordination-induced n-doping of PCBM for stable and efficient inverted perovskite solar cells. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-49395-7

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