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首页> 外文期刊>Chemistry: A European journal >Solution-processed, undoped, deep-blue organic light-emitting diodes based on starburst oligofluorenes with a planar triphenylamine core
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Solution-processed, undoped, deep-blue organic light-emitting diodes based on starburst oligofluorenes with a planar triphenylamine core

机译：基于具有平面三苯胺核的星爆低芴的固溶处理，未掺杂，深蓝色有机发光二极管

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摘要

A series of starburst oligomers (T1-T3) 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 123-129 °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.
机译：通过铃木交叉偶联反应，设计并合成了一系列星爆型低聚物（T1-T3），它们含有一个完全由二芳基亚甲基桥连的三苯胺核和低聚芴臂。还研究了它们的热，光物理和电化学性质。这些材料在123-129°C的范围内显示出高玻璃化转变温度，并具有良好的成膜能力。它们在溶液和薄膜中均显示深蓝色发射。基于这些低聚物的溶液处理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，器件性能得到了显着提高。包含T3作为发射极的双层器件的最大电流效率为3.83 cd A〜（-1），最大外部量子效率为4.19％，CIE坐标为（0.16，0.09），为最大值。用于基于可溶液处理的星爆低聚物的未掺杂深蓝色OLED。

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