[{"from": "human", "value": "What is solar cell average value of PCE of given SMILES as a p-type polymer and PC71BM or PCBM? ->  CC1=CC=C(C2=C(CC(CCCCCCCC)CCCCCCCCCC)C=C(C3=CC=C(C4=CC(CC(CCCCCCCCCC)CCCCCCCC)=C(C5=CC=C(C)S5)S4)C6=NSN=C63)S2)S1\n"}, {"from": "gpt", "value": " 2.6\n"}]