[{"from": "human", "value": "What is solar cell average value of PCE of given SMILES as a p-type polymer and PC71BM or PCBM? ->  O=C(OCC(CC)CCCC)C1=CC2=C(C)SC(C3=CC4=C(C5=CC=C(CC(CCCC)CC)S5)C(SC(C)=C6)=C6C(C7=CC=C(CC(CC)CCCC)S7)=C4S3)=C2S1\n"}, {"from": "gpt", "value": " 6.21\n"}]