[{"from": "human", "value": "Write solar cell average value of PCE of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC(S1)=CC2=C1C(OCCCCCCCCCCCC)=C(C=C(C3=CC=C(C)S3)S4)C4=C2OCCCCCCCCCCCC\n"}, {"from": "gpt", "value": " 1.6\n"}]