Organic luminescent materials with high fluorescence efficiencies in the solid state are highly desired in OLED devices. In this work, we report the synthesis and characterization of a series of novel dipolar luminogens based on thieno [3,2-b]thiophene S,S-dioxide (TTDO). The crystal structures, photophysical property, thermal stability, electronic structures and electrochemical behaviors of these TTDO-based luminogens are investigated. These luminogens have good aggregation-induced emission (AIE) property with high solid-state fluorescence quantum yields, and their emission wavelengths are tuned from green to red by different electron-donating substituents. They enjoy high thermal and morphological stabilities and have low LUMO energy levels. Nondoped OLEDs are fabricated with these new luminogens, providing orange to red electroluminescence (568–610 nm) with maximum external quantum efficiencies of up to 2.79%. These results demonstrate that these new AIE-active luminogens could be promising candidates for OLEDs.

在OLED器件中非常需要固态的具有高荧光效率的有机发光材料。在这项工作中，我们报告了基于噻吩并[3,2-b]噻吩S，S-dioxide（TTDO）的一系列新型偶极发光剂的合成和表征。研究了这些基于TTDO的发光剂的晶体结构，光物理性质，热稳定性，电子结构和电化学行为。这些发光剂具有良好的聚集诱导发射（AIE）特性和高固态荧光量子产率，并且它们的发射波长通过不同的供电子取代基从绿色调到红色。它们具有较高的热稳定性和形态稳定性，并且LUMO能级较低。非掺杂OLED是用这些新型发光剂制成的，提供橙色至红色的电致发光（568–610 nm），最大外部量子效率高达2.79％。这些结果表明，这些新型的具有AIE活性的发光剂有望成为OLED的有希望的候选者。