[{"from": "human", "value": "Given SMILES, write its solar cell solar cell solar cell average value of power conversion efficiency as a p-type polymer and PC71BM or PCBM. ->  O=C(C1=C2C(C3=C(C=C(C4=CC=C(C)S4)S5)C5=C26)=C(C(N(CC(CCCCCCCCCC)CCCCCCCCCCCC)C3=O)=O)C7=C1C=C(C)S7)N(CC(CCCCCCCCCCCC)CCCCCCCCCC)C6=O\n"}, {"from": "gpt", "value": " 4.8\n"}]