[{"from": "human", "value": "Write solar cell PCE of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC1=CC([Si]2(CCCCCCCC)CCCCCCCC)=C(S1)C3=C2C(S4)=C(S3)C5=C4C6=C([Si]5(CCCCCCCC)CCCCCCCC)C=C(C7=CC=C(C)C8=NSN=C78)S6\n"}, {"from": "gpt", "value": " 2.79\n"}]