A non-planar pentaphenylbenzene functionalized benzo[2,1,3]thiadiazole derivative as a novel red molecular emitter for non-doped organic light-emitting diodes
摘要:
一种新型的非平面五苯基苯功能化的苯并[2,1,3]硫二氮杂环衍生物(BPTBTD)已经设计并合成,仅需三步,并作为红色分子发射体应用于非掺杂有机发光二极管(OLEDs)。该分子在常见有机溶剂中显示出良好的溶解性、出色的热稳定性和成膜性。最重要的特征是,BPTBTD的光致发光在不同溶剂、不同浓度和不同固态下表现出极好的稳定性。采用简单的非掺杂配置,制备了不同厚度发光层的红色有机发光二极管。观察到饱和红光发射,峰值发射波长为621纳米,最大外量子效率为1.0%,最大亮度为1572 cd m−2。特别是,具有厚发光层的器件性能是具有薄发光层的器件的两倍。这些结果表明,非平面五苯基苯功能团显著抑制了薄固体薄膜中的分子聚集倾向,从而导致发光的稳定性和厚层器件的更高效率。
A non-planar pentaphenylbenzene functionalized benzo[2,1,3]thiadiazole derivative as a novel red molecular emitter for non-doped organic light-emitting diodes
作者:Xiaobo Sun、Xinjun Xu、Wenfeng Qiu、Gui Yu、Hengjun Zhang、Xike Gao、Shiyan Chen、Yanlin Song、Yunqi Liu
DOI:10.1039/b719390d
日期:——
A novel non-planar pentaphenylbenzene functionalized benzo[2,1,3]thiadiazole derivative (BPTBTD) has been designed and synthesized with only three steps, and applied into non-doped organic light-emitting diodes (OLEDs) as a red molecular emitter. The molecule exhibits good solubility in common organic solvents, excellent thermal stability and film-forming properties. The most important feature is that photoluminescence of BPTBTD shows excellent stablity in different solvents, at different concentrations and in different solid states. Red organic light-emitting diodes were fabricated in a facile non-doped configuration with different thicknesses of emission layers. Saturated red-emission was observed with an emission peak at 621 nm, a maximum external quantum efficiency of 1.0% and a maximum brightness of 1572 cd m−2. Especially, the properties of devices with thick emission layers are two times better than those of the devices with thin emission layers. These results indicate that the non-planar pentaphenylphenyl functional groups substantially suppressed the tendency for molecular aggregation in thin solid films, leading to a very stable photoluminescence and higher efficiency of devices with thicker layers.
一种新型的非平面五苯基苯功能化的苯并[2,1,3]硫二氮杂环衍生物(BPTBTD)已经设计并合成,仅需三步,并作为红色分子发射体应用于非掺杂有机发光二极管(OLEDs)。该分子在常见有机溶剂中显示出良好的溶解性、出色的热稳定性和成膜性。最重要的特征是,BPTBTD的光致发光在不同溶剂、不同浓度和不同固态下表现出极好的稳定性。采用简单的非掺杂配置,制备了不同厚度发光层的红色有机发光二极管。观察到饱和红光发射,峰值发射波长为621纳米,最大外量子效率为1.0%,最大亮度为1572 cd m−2。特别是,具有厚发光层的器件性能是具有薄发光层的器件的两倍。这些结果表明,非平面五苯基苯功能团显著抑制了薄固体薄膜中的分子聚集倾向,从而导致发光的稳定性和厚层器件的更高效率。