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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Color-stable non-doped white phosphorescent organic light-emitting diodes based on ultrathin emissive layers
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Color-stable non-doped white phosphorescent organic light-emitting diodes based on ultrathin emissive layers

机译：基于超薄发光层的彩色稳定的非掺杂白色磷光有机发光二极管

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摘要

Color-stable white organic light-emitting diode (WOLED) with bipolar mixed spacer based on ultrathin non-doped phosphorescent emitting layers was investigated. We find that the location and thickness of Bis(3,5-difluoro-2-(2-pyridyl) phenyl-(2-carboxypyridyl)iridium(III) (FIrPic) play a critical role on the spectral stability. Transient PL lifetime results show that the spectral variations with the driving voltage can be effectively controlled by enhanced energy transfer or weakened energy transfer respectively depending on different location of FIrPic. Meanwhile, green layer, located between blue layer and orange layer, acts an indispensable role in keeping the color stability by alleviating triplet?triplet annihilation and maintaining sequential energy transfer. The most stable spectrum of WOLED can be obtained with the change in Commission Internationale de L?Eclairage coordinates less than (0.001, 0.002) as the luminance increase from 697 cd m(?2) to about 16?550 cd m(?2) when FIrPic is on anode side. This discovery provides a significant method for achieving high-quality WOLEDs with superior color stability.
机译：研究了基于超薄非掺杂磷光发光层的双极混合间隔物的彩色稳定的白色有机发光二极管（Woled）。我们发现双（3,5-二氟-2-（2-吡啶基）苯基 - （2-羧基吡啶基）铱（III）（III）（FIRPIC）的位置和厚度在光谱稳定性上发挥着关键作用。瞬态PL寿命结果表明，可以通过分别提高能量转移或减弱的能量转移，从分别提高萤火虫的不同位置，有效地控制具有驱动电压的光谱变化。同时，位于蓝层和橙色层之间的绿色层，在保持颜色方面起到不可或缺的作用通过减轻三联网沉降稳定性，并保持顺序能量转移。通过委员会Internationale de l的变化，可以获得最稳定的磨损频谱，因为亮度从697cd m增加，eNlaulage坐标小于（0.001,000）（0.001,000）（？ 2）当FiRPIC在阳极侧时约16？550cd m（Δ2）。该发现提供了实现具有优异色彩稳定性的高质量磨损的显着方法。

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