[{"from": "human", "value": "Given SMILES, write its solar cell maximum value of power conversion efficiency as a p-type polymer and PC71BM or PCBM. ->  CC1=CC2=C(C(C3=CC=C(CCCCCCCCCCCC)S3)=C(C=C(C4=C5C(SC(C(C(CC)CCCC)=O)=C5F)=C(C)S4)S6)C6=C2C7=CC=C(CCCCCCCCCCCC)S7)S1\n"}, {"from": "gpt", "value": " 2.55\n"}]