A novel BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenan throline) - MAPbI_3-xCl_x composite light absorption film was fabricated to enhance the performance of perovskite solar cell (PSC). Compared with the device without BCP in MAPbI_3-xCl_x layer, the charge separation and transport and the quality of MAPbI_3-xCl_x film improved with the addition of BCP. The power conversion efficiency (PCE) increased from 10.69% to 16.25% with an optimized ratio of BCP additive. A reduced J-V hysteresis was simultaneously exhibited by the perovskite solar cell with a planer structure of FTO/TiO₂/perovskite film/Spiro-OMETAD/Ag. These enhanced performances are owing to smoother surface coverage, smaller series resistance and stronger charge separation, as BCP is used as additive. This work provides a new method to modify and improve the performance of planer perovskite solar cells.

为了增强钙钛矿型太阳能电池（PSC）的性能，制备了新型的BCP（2,9-二甲基-4,7-二苯基-1,10-菲咯啉）-MAPbI _3-x Cl _x复合光吸收膜。与在MAPbI _3-x Cl _x层中没有BCP的器件相比，通过添加BCP可以改善电荷分离和传输以及MAPbI _3-x Cl _x膜的质量。功率转换效率（PCE）从BCP添加剂的最佳比例从10.69％提高到16.25％。具有FTO / TiO ₂平面结构的钙钛矿太阳能电池同时展现出降低的JV滞后性/钙钛矿膜/ Spiro-OMETAD / Ag。这些性能的提高归因于将BCP用作添加剂的更平滑的表面覆盖范围，更小的串联电阻和更强的电荷分离能力。这项工作提供了一种新的方法来修改和改善平面钙钛矿太阳能电池的性能。