[{"from": "human", "value": "What is solar cell poly dispersity index of given SMILES as a p-type polymer and PC71BM or PCBM? ->  CC1=C(CC(CC)CCCC)C=C(C2=C(C(C3=C(CC(CC)CCCC)SC(CC(CCCC)CC)=C3C4=O)=O)C4=C(C5=CC(CC(CC)CCCC)=C(C6=CC=C(C7=CC=C(C)S7)S6)S5)S2)S1\n"}, {"from": "gpt", "value": " 6.53\n"}]