[{"from": "human", "value": "Write solar cell power conversion efficiency of given SMILES as a p-type polymer and PC71BM or PCBM. ->  CC1=CC(SC2=C3C(C4=CC(CCCCCCCCCC)=C(CCCCCCCCCC)S4)=C5C(C(SC(C6=CC=C(C)C7=NSN=C76)=C8)=C8S5)=C2C9=CC(CCCCCCCCCC)=C(CCCCCCCCCC)S9)=C3S1\n"}, {"from": "gpt", "value": " 4.9\n"}]