[{"from": "human", "value": "Given SMILES, write its solar cell maximum value of PCE as a p-type polymer and PC71BM or PCBM. ->  O=C(OCC(CC)CCCC)C1=C(F)C2=C(C)SC(C3=CC4=C(C(C5=CC=C(CC(CC)CCCC)S5)=C(C=C(C)S6)C6=C4C7=CC=C(CC(CC)CCCC)S7)S3)=C2S1\n"}, {"from": "gpt", "value": " 5.9\n"}]