[{"from": "human", "value": "Write solar cell power conversion efficiency of given SMILES as a p-type polymer and PC71BM or PCBM. ->  O=C1N(CC(CC)CCCC)C(C2=CC(CCCCCC)=C(C)S2)=C3C(N(CC(CC)CCCC)C(C4=CC(CCCCCC)=C(S4)C5=CC6=C(C(C7=CC=C(CC(CC)CCCC)S7)=C(C=C(C)S8)C8=C6C9=CC=C(CC(CC)CCCC)S9)S5)=C31)=O\n"}, {"from": "gpt", "value": " 2.46\n"}]