| Abstract: | The regulated crystallization of perovskite and highly repeatable preparation are decisive challenges for large-scale flexible perovskite solar cells(PSCs). Herein, we synthesize an oil-soluble poly(3,4-ethylenedioxythiophene)(Oil-PEDOT) as a hole transport layer(HTL). The non-wetting Oil-PEDOT HTL can promote the quality of large-area flexible perovskite films because of its optimized crystallinity and printability. The Oil-PEDOT layer also delivers desirable conductivity and charge transport without a complex doping. Consequently, the flexible PSCs with Oil-PEDOT HTL achieve an efficiency of 19.51% and 16.70%based on 1.05 and 22.50 cm~2, respectively. Moreover, these large-scale flexible PSCs demonstrate remarkable mechanical robustness, and the efficiency exhibits 93% retention after 7,000 bending cycles. These results show that the Oil-PEDOT is a potentially efficient HTL for fabricating efficient large-scale flexible PSCs. |
