In this work, fullerene derivatives (ICBA and PCBM) are dissolved into perovskite precursors, and the corresponding perovskite solar cells are fabricated. Compared to PCBM, ICBA has better solubility in perovskite precursor solution (DMF). The added small amount of ICBA filled the vacancies at the grain boundaries of perovskite, and produced continuous pathways for electron extraction to enhance performance. Steady-state and time-resolved photoluminescence, together with the impedance measurements confirm the enhanced electron transporting property in perovskite-ICBA film. An excellent PCE of 18.14% is achieved in CH₃NH₃PbI_3-xCl_x-ICBA-based solar cells with significantly suppressed hysteresis. Poor solubility of PCBM leads to a low concentration of PCBM in perovskite precursor, and results in a moderate PCE of 16.54% in device containing Perovskite-PCBM. By contrast, device based on pristine perovskite shows an inferior efficiency of 15.49% with large hysteresis. PSCs prepared from perovskite-ICBA with large area (1.12 cm²) are also fabricated, exhibiting a PCE of 13.69%. Results demonstrate that the strategy of dissolving ICBA into perovskite precursor directly is an efficient and facile way to improve PSCs performance as well as to reduce hysteresis.

在这项工作中，富勒烯衍生物（ICBA和PCBM）被溶解在钙钛矿前体中，并制造出相应的钙钛矿太阳能电池。与PCBM相比，ICBA在钙钛矿前体溶液（DMF）中具有更好的溶解度。添加的少量ICBA填补了钙钛矿晶界的空位，并产生了连续的电子提取途径，以增强性能。稳态和时间分辨的光致发光，以及阻抗测量结果证实了钙钛矿-ICBA薄膜具有增强的电子传输性能。在CH ₃ NH ₃ PbI _{3- x} Cl _x中实现了18.14％的出色PCE-基于ICBA的太阳能电池具有显着抑制的滞后性。PCBM的溶解度差会导致钙钛矿前体中PCBM的浓度降低，并且在含有钙钛矿-PCBM的设备中导致适度的PCE为16.54％。相比之下，基于原始钙钛矿的设备在滞后较大的情况下效率却低至15.49％。还制造了由钙钛矿型ICBA制备的大面积（1.12 cm ²）的PSC ，其PCE为13.69％。结果表明，将ICBA直接溶解在钙钛矿前体中的策略是提高PSC性能并减少磁滞的有效且简便的方法。