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A new electron-transporting material 4,7-diphenyl-1,10-phenanthroline-2,9-dicarboxylic acid (DPPA) was synthesized by modifying a n-type small molecule bathocuproine (BCP). The introduced carboxyl groups make DPPA soluble in polar solvent and compatible with large-scale solution-processing techniques. The anchoring of carboxyl on ZnO (or ITO) substrates helps to form a DPPA electron transporting layer,...
Two new donor–acceptor (D–A) polymers composed of benzo[1,2-b:4,5-b′]dithiophene (BDT) as donor and thiadiazolo[3,4-c]pyridine (PyTZ) as acceptor were designed and synthesized. Compared to the polymer based on BDT and 4,7-dithien-2-yl-2,1,3-benzothiadiazole (DTBT), the planarity, energy levels, and band-gaps of the new polymers were fine adjusted by incorporating conjugated alkylthienyl side chains...
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