Highly luminescent network films from electrochemical deposition of peripheral carbazole functionalized fluorene oligomer and their applications for light-emitting diodes
where aromatic carbazole and oligofluorenes were linked at both ends of a hexyl chain to obtain a series of carbazole/oligofluorene end-capped hexanes. These newly designed compounds show high solubility, good film morphology, high thermal stability, blue emission, hightripletenergy, and suitable frontier orbital energy levels with good charge transport properties; when used as host materials in solution-processed
烷基取代基有望改善用于有机光电器件溶液加工的芳香族化合物的溶解度和薄膜形态。然而,电子惰性烷基的引入通常会阻碍空穴和电子的注入以及在芳族单元之间/之间的转移,从而导致材料的电子性能降低,从而降低器件性能。在这里,我们提出了一种替代方法,即通过芳族双末端封端的烷基化反应,其中芳族咔唑和低聚芴在己基链的两端相连,以获得一系列咔唑/低聚芴封端的己烷。这些新设计的化合物显示出高溶解度,良好的薄膜形态,高的热稳定性,蓝色发射,高的三重态能量以及合适的前沿轨道能级,并具有良好的电荷传输性能;当用作溶液处理的磷光有机发光二极管(PhOLED)的主体材料时,这些分子表现出很高的器件性能,最大电流效率为28.0 cd A -1外部量子效率高达7.8%。我们结合烷基和芳族单元优点的策略为设计高性能可溶液加工的有机光电材料提供了一种有效的方法。
Wide bandgap materials design toward tunable bandgap and increased carries injection property: silane interrupting π-conjugation together with peripheralcarbazolyl substituents
作者:Dehua Hu、He Liu、Ping Lu、Fangzhong Shen、Ying Lv、Yuguang Ma
DOI:10.1039/c4ra16797j
日期:——
Universal host for blue, green and red phosphorescent dopants is achieved by rational molecule design with silane interrupting π-conjugation and non-conjugated peripheralcarbazolyl substituents.
Covalent Functionalized Conjugated Dendrimers for Organic Light Emitting Diodes: Synthesis, Characterization, and the Deep Blue Electroluminescence
作者:Yan Zhou、Lin Ding、Li-Ming Xiang、Jian Pei
DOI:10.1071/ch10320
日期:——
Two deep blue-emitting dendrimers 11 and 12 with carbazole containing dendrons were developed in this contribution. The carbazole-containing units were introduced to tune the charge-transporting property of the desired dendrimers. The investigation of photophysicalproperties, electrochemical, and electroluminescence properties demonstrated that the balance between electron and hole transporting was
Highly-efficient solution-processed OLEDs based on new bipolar emitters
作者:Ming Zhang、Shanfeng Xue、Wenyue Dong、Qi Wang、Teng Fei、Cheng Gu、Yuguang Ma
DOI:10.1039/c001170c
日期:——
A series of new bipolar solution-processable RGB materials are designed by considering the solubility, morphology, fluorescence efficiency and carriers balance. Solution-processable OLEDs are fabricated with high efficiencies, especially, the green TCBzC-based device shows the maximum luminous efficiency of 31.6 cd A−1, which is among the best reported values.
考虑到溶解度、形态、荧光效率和载流子平衡,设计了一系列新型双极溶液可加工 RGB 材料。制备出的可溶液加工有机发光二极管具有很高的发光效率,特别是基于 TCBzC 的绿色器件显示出 31.6 cd A-1 的最大发光效率,是目前报道的最佳值之一。