Long-Lived Flexible Displays Employing Efficient and Stable Inverted Organic Light-Emitting Diodes
Long-Lived Flexible Displays Employing Efficient and Stable Inverted Organic Light-Emitting Diodes
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DOI：
10.1002/adma.201706768
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发表时间：
2018-07-12
影响因子：
29.4
通讯作者：
Shimizu, Takahisa
中科院分区：
文献类型：
--
作者：
Fukagawa, Hirohiko;Sasaki, Tsubasa;Shimizu, Takahisa
尽管有机发光二极管（OLED）有希望用于诸如柔性显示器的应用中，但是由于OLED的差的环境稳定性，长寿命的柔性OLED基器件的报道是有限的。塑料等柔性基底允许环境氧气和水分渗透到器件中，这会使传统OLED（cOLED）中用于电子注入层的碱金属降解。在此，报道了使用高效且稳定的倒置OLED（iOLED）制造长寿命柔性显示器，其中可以在不使用碱金属的情况下有效地注入电子。采用iOLED的柔性显示器可以在简化封装的情况下发光超过1年，而采用cOLED的柔性显示器在相同封装的情况下仅在21天后几乎不发光。这些结果证明了iOLED替代采用碱金属的cOLED用于各种柔性有机光电器件的巨大潜力。
Although organic light-emitting diodes (OLEDs) are promising for use in applications such as in flexible displays, reports of long-lived flexible OLED-based devices are limited due to the poor environmental stability of OLEDs. Flexible substrates such as plastic allow ambient oxygen and moisture to permeate into devices, which degrades the alkali metals used for the electron-injection layer in conventional OLEDs (cOLEDs). Here, the fabrication of a long-lived flexible display is reported using efficient and stable inverted OLEDs (iOLEDs), in which electrons can be effectively injected without the use of alkali metals. The flexible display employing iOLEDs can emit light for over 1 year with simplified encapsulation, whereas a flexible display employing cOLEDs exhibits almost no luminescence after only 21 d with the same encapsulation. These results demonstrate the great potential of iOLEDs to replace cOLEDs employing alkali metals for use in a wide variety of flexible organic optoelectronic devices.