Benzothiadiazole–ethynylthiophenezoic acid as an acceptor of photosensitizer for efficient organic dye-sensitized solar cells
作者:Yanfei Mu、Heng Wu、Guangxing Dong、Zuochun Shen、Sining Li、Min Zhang
DOI:10.1039/c8ta08363k
日期:——
fragments has brought forth considerable advances in the power conversion efficiencies (PCEs) of organic dye-sensitized solar cells in the past decade. In this work, we construct a 5-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)thiophene-2-carboxylic acid (BTETA) segment and employ it as the electron acceptor to exploit a donor–acceptor sensitizer in combination with the triarylamine-cyclopentadithiophene electron
在过去的十年中,富电子片段和缺电子片段的逻辑链接在有机染料敏化太阳能电池的功率转换效率(PCE)中取得了长足的进步。在这项工作中,我们构建了5-(苯并[ c] [1,2,5]噻二唑-4-基乙炔基)噻吩-2-羧酸(BTETA)链段,并将其用作电子受体,与三芳基胺-环戊二噻吩电子供体结合使用供体-受体敏化剂。对于其基于高效苯并噻二唑-苯甲酸(BTBA)受体的同类物,这种电子缺乏性受体BTETA的使用不会过多改变最高占据分子轨道(HOMO)的能级,但会明显导致最低空位分子轨道(LUMO)能级的向下位移。由此产生的能隙收缩使新染料具有红移的吸收峰,同时具有更高的摩尔吸收系数,−2模拟的AM1.5条件。