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Crosslinkable TAPC-Based Hole-Transport Materials for Solution-Processed Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off

机译:基于交联的基于TAPC的空穴传输材料,用于溶液处理的有机发光二极管,降低了滚降效率

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摘要

1-Bis[4-[N,N-di(4-tolyl)amino]phenyl]-cydohexane (TAPC) has been widely used in xerography and organic light-emitting diodes (OLEDs), but derivatives are little known. Here, a new series of solution-processable, crosslink-able hole conductors based on TAPC with varying highest occupied molecular orbital (HOMO) energies from -5.23 eV to -5.69 eV is implemented in blue phosphorescent OLEDs. Their superior perfomance compared with the well-known N4,N4,N4',N4'-tetraphenylbiphenyl-4,4'-diamine (TPDs) analogues regarding hole-injection and mobility, electron and exciton blocking capabilities, efficiency, and efficiency roll-off is demonstrated. Overall, the TA PC-based devices feature higher luminous and power efficiency over a broader range of brightness levels and reduced efficiency roll off. A systematic broadening of the emission zone is observed as the hole-injection barrier between the anode and the hole-transporting layer increased.
机译:1-双[4- [N,N-二(4-甲苯基氨基)苯基]-环己烷(TAPC)已广泛用于静电复印和有机发光二极管(OLED),但其衍生物鲜为人知。在这里,在蓝色磷光OLED中实现了一系列基于TAPC的可溶液处理的,可交联的新型空穴导体,其最高占据分子轨道(HOMO)能量在-5.23 eV至-5.69 eV之间变化。与著名的N4,N4,N4',N4'-四苯基联苯-4,4'-二胺(TPDs)类似物相比,它们在空穴注入和迁移率,电子和激子阻断能力,效率和效率滚动等方面的性能更高。关闭被证明。总体而言,基于TA PC的设备在更宽的亮度范围内具有更高的发光效率和功率效率,并降低了效率下降。随着阳极和空穴传输层之间的空穴注入势垒的增加,观察到了发射区的系统扩展。

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  • 来源
    《Advanced Functional Materials》 |2013年第3期|359-365|共7页
  • 作者单位

    Physikalische Chemie Universitat zu Koln Luxemburger Strafe 116, 50939 Koln, Germany;

    Physikalische Chemie Universitat zu Koln Luxemburger Strafe 116, 50939 Koln, Germany;

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