Bis(carbazol-9-yl)phenyl end-caped polyaromatics as solution-processed deep blue fluorescent emitters for simple structure solution-processed electroluminescent devices
作者:Anna Pachariyangkun、Praweena Wongkaew、Taweesak Sudyoadsuk、Supawadee Namuangruk、Vinich Promarak
DOI:10.1016/j.dyepig.2020.109065
日期:2021.2
have been designed and synthesized in this contribution for blue OLED application. The molecules are constructed from basic building blocks of blue chromophores (anthracene or pyrene derivatives) and end-capped with charge transporting (1,3-phenylene)bis(3,6-di-tert-butyl-9H-carbazole) units which provided the tunable emission in the blue spectral range. Their optical, electrochemical, photophysical
有机发射器(特别是蓝色)的发展是影响面板显示应用中有机发光二极管(OLED)范围的关键因素。由于发蓝光的材料稀疏,但对于高效能器件非常需要,因此一系列不同的共轭核心有机小分子荧光发射器(CAC,C-BA-C,C-PA-C,C-NA-C,CPC和C-BP-C)已被设计并合成用于蓝色OLED应用。这些分子是由蓝色发色团(蒽或pyr衍生物)的基本结构单元构成的,并被电荷传输(1,3-亚苯基)双(3,6-二叔丁基)封端-丁基-9H-咔唑)单元,可在蓝色光谱范围内提供可调发射。系统地研究了它们的光学,电化学,光物理和热性能以及器件性能。基于CAC的最佳器件性能作为发射器,可提供3.7 V的低导通电压,3.24%的外部量子效率,在CIE坐标x = 0.155时具有高色纯度(FWHM = 59)的强深蓝光发射(424 nm) ,y = 0.066。