[{"from": "human", "value": "Given SMILES, write its solar cell PDI as a p-type polymer and PC71BM or PCBM. ->  CC1=CC(N(CC(CCCCCC)CCCC)C(C2=C3SC(C4=CC(C(CCC(CCCC)CC)=C(SC(C)=C5)C5=C6CCC(CCCC)CC)=C6S4)=C2)=O)=C3S1\n"}, {"from": "gpt", "value": " 4.08\n"}]