Solution-processed white organic light-emitting diodes with blue fluorescent and orange-red thermally activated delayed fluorescent dendritic luminogens
作者:Jiwon Yoon、Suna Choi、Cheol Hun Jeong、Seong Keun Kim、Hyuna Lee、Youngseo Kim、Jang Hyuk Kwon、Sungnam Park、Min Ju Cho、Dong Hoon Choi
DOI:10.1016/j.dyepig.2019.107650
日期:2019.11
used for the application of white organic light-emitting diodes (WOLEDs). These molecules have appropriately high molecular weights, which are favorable for the fabrication of thin films with fine surface morphologies. Interestingly, the blue emitting 3ICz-Tr displays fluorescent character and the orange-red emitting Tri-tNID exhibited thermally activated delayed fluorescence, which was confirmed by
在这项工作中,合成了树枝状发光体,即3ICz-Tr作为蓝色发射体,Tri-tNID作为橙红色发射体,并用于白色有机发光二极管(WOLED)的应用。这些分子具有适当高的分子量,这对于制造具有精细表面形态的薄膜是有利的。有趣的是,发射蓝光的3ICz-Tr显示荧光特征,而发射橙红的Tri-tNID表现出热激活的延迟荧光,这已通过稳态和瞬态光致发光(TRPL)光谱证实。最终,可以通过混合两个分子并优化其混合成分来实现WOLED器件。在我们制造的器件中,具有Tri-tNID和3ICz-Tr(0.5:99.5重量比)而没有其他主体材料的器件显示出近乎纯白色的发射,最大EQE为8.32%,CIE坐标为(0.32,0.30)。此外,通过改变两个树枝状分子的组成,可以在相应的WOLED中将发光颜色从暖白色调整为冷白色。