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首页> 外文期刊>Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology >Star-shaped hexakis(9,9-dihexyl-9H-fluoren-2-yl)benzene end-capped with carbazole and diphenylamine units: solution-processable, high T_g hole-transporting materials for organic light-emitting devices
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Star-shaped hexakis(9,9-dihexyl-9H-fluoren-2-yl)benzene end-capped with carbazole and diphenylamine units: solution-processable, high T_g hole-transporting materials for organic light-emitting devices

机译：用咔唑和二苯胺单元封端的星形六（9,9-二己基-9H-芴-2-基）苯：可溶液加工的高T_g空穴传输材料，用于有机发光器件

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摘要

Two new hole-transporting materials, namely HFB-Cz and HFB-Dpa, were designed and synthesized by attaching carbazole and diphenylamine units to the hexakis(9,9-dihexyl-9H-fluoren-2-yl)benzene (HFB) core via Buchwald-Hartwig coupling reaction. The long alkyl chain and core rigidity endow these compounds with good solution processability and high thermal stability. HFB-Cz and HFB-Dpa exhibit significantly high glass transition temperatures (225 and 154 °C) relative to widely used hole-transporting materials, such as N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD, 65 °C) and 1,4-bis((l-naphthylphenyl)amino)biphenyl (NPB, 96 °C). Solution-processed green OLED devices using HFB-Cz and HFB-Dpa as hole-transporting materials exhibit very high efficiencies with a maximum current efficiency up to 6.2 cd A~(-1). These efficiencies are substantially higher than the NPB-bascd control device, and are among the highest for the hole-transporting materials in similar device configuration.
机译：通过将咔唑和二苯胺单元通过六氟（9,9-二己基-9H-芴-2-基）苯（HFB）核连接，设计并合成了两种新型的空穴传输材料HFB-Cz和HFB-Dpa。布赫瓦尔德-哈特维格偶联反应。长的烷基链和核的刚性赋予这些化合物良好的溶液加工性能和较高的热稳定性。相对于广泛使用的空穴传输材料，例如N，N'-双（3-甲基苯基）-1,1'-联苯基-，HFB-Cz和HFB-Dpa表现出明显高的玻璃化转变温度（225和154°C）。 4,4'-二胺（TPD，65°C）和1,4-双（（1-萘基苯基）氨基）联苯（NPB，96°C）。使用HFB-Cz和HFB-Dpa作为空穴传输材料的固溶处理绿色OLED器件具有很高的效率，最大电流效率高达6.2 cd A〜（-1）。这些效率大大高于基于NPB的控制设备，并且在类似设备配置中对于空穴传输材料来说是最高的。

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