Five metal-free organic dyes (DIA1–DIA5) based on rigid triarylamine donors have been synthesized and their photophysical/electrochemical properties, theoretical calculations and dye-sensitized solar cell (DSSC) performances have been investigated. All the five dyes showed a high molar extinction coefficient (5.0 × 104–8.1 × 104 M−1 cm−1). Electrochemical measurement data indicates that the HOMO and LUMO energy levels can be conveniently tuned by alternating the π-spacer moiety. Among the five dyes, DIA3 showed the best photovoltaic performance, which was greatly increased to 8.09% by an optimized condition under standard global AM 1.5 solar light condition. The results show that the dyes based on this rigid donor are promising candidates for the improvement of the performance of DSSCs.
合成了五种基于刚性
三芳胺供体的无
金属有机
染料(DIA1–DIA5),并研究了它们的光物理/电
化学性质、理论计算以及
染料敏化太阳能电池(DSSC)的性能。所有五种
染料均显示出高的摩尔消光系数(5.0 × 10^4–8.1 × 10^4 M−1 cm−1)。电
化学测量数据显示,HOMO和LUMO能级可以通过改变π-间隔基团进行便捷调控。在这五种
染料中,DIA3表现出最佳的光伏性能,在标准全球
AM 1.5太阳光条件下,经过优化后其效率显著提高至8.09%。结果表明,基于这种刚性供体的
染料是提升DSSC性能的有希望的候选材料。