▎ 摘　　要

We demonstrate the potential of using reduced-fluorinated graphene oxide (F-rGO) in improving the performance of polymer bulk-heterojunction when added as a ternary additive. The best device using poly [4,8-bis(5-(2-ethylhexyl)thiophen-2-yebenzo [1, 2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno [3, 4-b] thiophene)-2-carboxylate-2-6-diyel)](PTB7-th): [6,6] -phenylC(71)-butyric-acid-methyl-ester (PC71BM): F-rGO (5 wt%) ternary blend, showed a higher power conversion efficiency (PCE) similar to 7.36 % compared to devices without F-rGO (PCE similar to 3.54 %). F-rGO nanosheets not only enhance the charge dissociation by promoting the electron extraction from PTB7-th to PCBM, but also support charge transport by providing conducting pathways. It is attributed to F-rGO induced p-doping effect owing to high work-function of F-rGO nanosheets, and enhanced hole mobility due to improved film morphology. This results in enhanced performance of (PTB7-th:PCBM:F-rGO) based-ternary organic solar cell devices.