Acquiring High-Performance Deep-Blue OLED Emitters through an Unexpected Blueshift Color-Tuning Effect Induced by Electron-Donating -OMe Substituents
作者:Song Peng、Yihuan Zhao、Caixia Fu、Xuemei Pu、Liang Zhou、Yan Huang、Zhiyun Lu
DOI:10.1002/chem.201800974
日期:2018.6.7
trimethoxy‐substituted objective compound can act as a high‐performance deep‐blue organic light‐emitting diode (OLED) emitter, and OLED based on it emits deep‐blue light with CIE coordinates of (0.148, 0.084), maximum luminance of 7800 cd m−2, and maximum external quantum efficiency of 5.1 %. These results not only shed light on the molecular design strategy for high‐performance deep‐blue OLED emitters through
合成了一系列在苯氧基亚基上带有-CF 3,-OMe或-N(Me)2取代基的7-(二苯基氨基)-4-苯氧基香豆素蓝色发射衍生物。尽管‐CF 3和‐N(Me)2发现修饰会触发红移的荧光,证明OMe取代会对深蓝色区域产生意想不到的蓝移颜色调整效果。原因是给电子的中度OMe基团可以使香豆素具有不变的HOMO,但提高了LUMO的能级。此外,发现OMe取代有利于这些香豆素的热稳定性。因此,三甲氧基取代的目标化合物可以充当高性能的深蓝色有机发光二极管(OLED)发射器,并且基于它的OLED发出的深蓝色光的CIE坐标为(0.148,0.084),最大亮度的7800 cd m -2,最大外部量子效率为5.1%。这些结果不仅揭示了通过色彩调节实现高性能深蓝色OLED发射器的分子设计策略,而且还展示了香豆素衍生物作为深蓝色OLED发射器的观点。