[{"from": "human", "value": "What is solar cell solar cell band gap of given SMILES as a p-type polymer and PC71BM or PCBM? ->  CC1=CC(C(OCC(CCCC)CC)=O)=C(C2=CC=C(C)S2)S1\n"}, {"from": "gpt", "value": " 1.69\n"}]