[{"from": "human", "value": "Write solar cell PCE of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC1=CC(CC(CCCCCCCC)CCCCCC)=C(C2=CC=C(C3=CC=C(C)S3)S2)S1\n"}, {"from": "gpt", "value": " 3.4\n"}]