A series of liquid crystalline organic dyes consisting of fluorenyl hexa-peri-hexabenzocoronene (FHBC) and diketopyrrolopyrrole (DPP) units was synthesised and characterised. Their thermotropic behaviour is a result of the strong π–π association between FHBC units while the DPP unit enhances light absorption. With small changes in the molecular structure, significant differences in molecular organisation were observed in solid state. In turn, the molecular arrangement led to variations in the semiconducting properties of these materials and, ultimately, their performance in organic solar cells.
我们合成了一系列液晶有机
染料,它们由
芴基六-过-六苯并
硼烯(FHBC)和二酮
吡咯并
吡咯(
DPP)单元组成,并对其进行了表征。它们的热致性是 FHBC 单元之间强 π-π 关联的结果,而
DPP 单元则增强了光吸收。随着分子结构的微小变化,在固态下观察到了分子组织的显著差异。反过来,分子排列导致了这些材料半导体特性的变化,并最终影响了它们在有机太阳能电池中的性能。