[{"from": "human", "value": "Write solar cell power conversion efficiency of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC1=CC([Si]2(CCCCCCCC)CCCCCCCC)=C(S1)C3=C2C=C(S3)C4=CC(OCCCCCCCC)=C(C5=NC(SC(C6=C(OCCCCCCCC)C=C(C)S6)=N7)=C7S5)S4\n"}, {"from": "gpt", "value": " 2.1\n"}]