Development of naphtho[l,2-b:5,6-b']dithiophene based novel small molecules for efficient bulk-heterojunction organic solar cells

摘要

Two new small molecules with a rigid planar naphtho[1,2-b:5, 6-b']dithiophene (NDT) unit were designed and synthesized. Solution processed bulk-hetereojunction organic solar cells based on blends of the small molecules and [6,6]-phenyl-C_(71)-butyric acid methyl ester (PC_(71)BM) exhibited promising photovoltaic device performance with a maximum power conversion efficiency up to 2.20% under the illumination of AM 1.5G, 100 mW cm~(-2).