We designed and synthesized new substituted carbazole dyes, MK-14 and -16, for dye-sensitized solar cells (DSSCs) employing the I−/I3−redox couple. By the addition of a hexyloxyphenyl substituent to previously reported carbazole dyes MK-1 and -2, the electron lifetime and open circuit voltage of the DSSCs employing these dyes were increased, showing comparable values with those using a conventional Ru complex dye. This result was achieved by the retardation of the charge recombination, caused by more effective blocking of the I3− ion in the electrolyte than that in the cases of MK-1 and -2. The result shows the importance of the position of alkyl chains attached to the main framework of dye molecules.
我们设计并合成了新的取代
咔唑染料 MK-14 和 -16,用于采用 I-/I3 氧化还原
偶联剂的
染料敏化太阳能电池 (DSSC)。通过在之前报道的
咔唑染料 MK-1 和 -2 中添加一个己氧基苯基取代基,使用这些
染料的 DSSC 的电子寿命和开路电压都得到了提高,与使用传统 Ru 复合物
染料的 DSSC 的电子寿命和开路电压值相当。与 MK-1 和 -2 相比,电解质中的 I3- 离子被更有效地阻断,从而延缓了电荷
重组。 这一结果表明了
染料分子主框架上烷基链位置的重要性。