[{"from": "human", "value": "Write solar cell fill factor of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC1=CC(C(CCCCCCCCCCCC)=C(CCCCCCCCCCCC)C2=C3C=C4C(C(SC(C5=CC=C(C)C6=NSN=C65)=C7)=C7C(CCCCCCCCCCCC)=C4CCCCCCCCCCCC)=C2)=C3S1\n"}, {"from": "gpt", "value": " 0.64\n"}]