[{"from": "human", "value": "Given SMILES, write its solar cell maximum value of PCE as a p-type polymer and PC71BM or PCBM. ->  CC(S1)=CC2=C1C3=C(C(C4=CC(CCCCCCCCCC)=C(CCCCCCCCCC)S4)=C(C5=C(C=C(C6=C7C(C=C(C(C(CC)CCCC)=O)S7)=C(C)S6)S5)S8)C8=C3C9=CC(CCCCCCCCCC)=C(CCCCCCCCCC)S9)S2\n"}, {"from": "gpt", "value": " 6.74\n"}]