Abstract

In recent works in <i>Science, Nature</i> and <i>Nature Energy</i>, pseudohalide anions, such as SCN<sup>−</sup>, CH<sub>3</sub>COO<sup>−</sup>, and HCOO<sup>−</sup> have demonstrated the unique advantages in aspects of tuning the growth, properties, and stability of perovskite films in connection with solar cells. The FAPbI<sub>3</sub> perovskite solar cell devices with HCOO<sup>−</sup> engineering achieved a power conversion efficiency up to 25.6% (certified 25.2%) with long-term operational stability.

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