PEDOT:PSS is one of the most widely used hole transporting layer for inverted perovskite solar cells. Yet the performances of the corresponding perovskite solar cells are not satisfactory. Here, we demonstrate that KCl modified PEDOT:PSS film can promote the crystallization of perovskite film and enlarge the perovskite crystals. At the same time, KCl can diffuse into the perovskite film and effectively passivate the defects. As a result, inverted perovskite solar cells fabricated on 10 mg mL⁻¹ PEDOT:PSS/KCl films exhibit an average power conversion efficiency of 16.24 %, which is enhanced by 17.77 % compared with the reference perovskite solar cells. Open circuit voltage of 1.009 V and power conversion efficiency of 17.09 % have also been demonstrated using the optimized 10 mg mL⁻¹ PEDOT:PSS/KCl films.

PEDOT:PSS 是倒置钙钛矿太阳能电池中应用最广泛的空穴传输层之一。然而，相应的钙钛矿太阳能电池的性能并不令人满意。在这里，我们证明了 KCl 改性的 PEDOT:PSS 薄膜可以促进钙钛矿薄膜的结晶并扩大钙钛矿晶体。同时，KCl可以扩散到钙钛矿薄膜中，有效钝化缺陷。因此，在 10 mg mL ^-1 PEDOT:PSS/KCl 薄膜上制造的倒置钙钛矿太阳能电池的平均功率转换效率为 16.24%，与参考钙钛矿太阳能电池相比提高了 17.77%。使用优化的 10 mg mL ^-1也证明了 1.009 V 的开路电压和 17.09 % 的功率转换效率 PEDOT：PSS/KCl 薄膜。