[{"from": "human", "value": "Given SMILES, write its solar cell VOC as a p-type polymer and PC71BM or PCBM. ->  O=C1C(C2=C(C3=CC=C(C)S3)N1CC(CCCCCCCC)CCCCCC)=C(C4=CC=C(C5=CC=C(C)S5)S4)N(CC(CCCCCC)CCCCCCCC)C2=O\n"}, {"from": "gpt", "value": " 0.67\n"}]