[{"from": "human", "value": "Given SMILES, write its solar cell open-circuit voltage as a p-type polymer and PC71BM or PCBM. ->  CC1=CC(C=C(OCC(CCCC)CC)C2=C3C(OCC(CCCC)CC)=CC4=C2SC(C5=C6C(C(F)=C(C(C(CC)CCCC)=O)S6)=C(C)S5)=C4)=C3S1\n"}, {"from": "gpt", "value": " 0.71\n"}]