Solution-Processed, Undoped, Deep-Blue Organic Light-Emitting Diodes Based on Starburst Oligofluorenes with a Planar Triphenylamine Core
Solution-Processed, Undoped, Deep-Blue Organic Light-Emitting Diodes Based on Starburst Oligofluorenes with a Planar Triphenylamine Core
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基于具有平面三苯胺核的星爆型低聚芴的溶液加工、未掺杂、深蓝色有机发光二极管
DOI：
10.1002/chem.201200062
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发表时间：
2012-05-29
影响因子：
4.3
通讯作者：
Cao, Yong
中科院分区：
文献类型：
--
作者：
Liu, Cui;Li, Yanhu;Cao, Yong
通过铃木交叉偶联反应设计并合成了一系列包含完全二芳基亚甲基桥联的三苯胺核心和低聚芴臂的星爆低聚物（T1T3）。还研究了它们的热、光物理和电化学特性。这些材料表现出高玻璃化转变温度（123129℃）和良好的成膜能力。它们在溶液中和薄膜中都显示出深蓝色发射。基于这些低聚物的溶液加工器件表现出高效的深蓝色电致发光，并且随着低聚芴臂的延伸，器件性能显着增强。以T3作为发射极的双层器件的最大电流效率为3.83 cd?A-1，最大外量子效率为4.19%，CIE坐标为（0.16，0.09），这是基于可溶液加工星爆低聚物的未掺杂深蓝色OLED的最高值之一。
A series of starburst oligomers (T1T3) that contained a fully diarylmethene-bridged triphenylamine core and oligofluorene arms were designed and synthesized through Suzuki cross-coupling reactions. Their thermal, photophysical, and electrochemical properties were also investigated. These materials showed high glass transition, in the range of 123129?degrees C, and good film-forming abilities. They displayed deep-blue emission both in solution and as thin films. Solution-processed devices based on these oligomers exhibited highly efficient deep-blue electroluminescence and the device performances were significantly enhanced with the extension of the oligofluorene arms. The double-layered device that contained T3 as an emitter showed a maximum current efficiency of 3.83 cd?A-1 and a maximum external quantum efficiency of 4.19?% with CIE coordinates of (0.16, 0.09), which are among the highest values for undoped deep-blue OLEDs that are based on solution-processable starburst oligomers.