Targeted and selective HOMO energy control by fine regulation of molecular planarity and its effect on the interfacial charge transfer process in dye-sensitized solar cells
作者:Fengyu Zhang、Ran Wang、Yajun Wang、Xiaomin Zhang、Bo Liu
DOI:10.1039/c9cp00091g
日期:——
conduction band. Accordingly, our results demonstrated that regulation of planarity at a donor bridge not only provides targeted and selective control of the HOMO of the dye, but also enable fine adjustment with multiple interfacial charge transfer processes. Molecular planarity deserves to play an important role in the design of organic dyes, providing a significant strategy for the further development
就有机染料的深入开发而言,有针对性和选择性的能量控制已成为越来越重要的目标。在此,设计并合成了基于D–π–A–π–A结构的两种吲哚啉敏化剂,它们的供体和受体段完全相同。通过将各种侧链引入供体桥来调节它们的分子平面性。有趣的是,随着供体桥平面性的提高,染料的HOMO能级逐渐升高,更重要的是,它们的LUMO能级保持在大约相同的值。此外,显然优选更好的分子平面性以获得更高的电荷注入效率,但是,过度平面的分子可能导致过高的HOMO能级,从而导致较差的染料再生效率。此外,3 -与在导带电荷复合。因此,我们的结果表明,调节供体桥处的平面度不仅可以对染料的HOMO提供针对性和选择性的控制,还可以通过多个界面电荷转移过程进行精细调节。分子平面度在有机染料的设计中应发挥重要作用,为进一步开发有机敏化剂提供了重要的策略。