Long-lived efficient delayed fluorescence organic light-emitting diodes using n-type hosts.
Long-lived efficient delayed fluorescence organic light-emitting diodes using n-type hosts.
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DOI：
10.1038/s41467-017-02419-x
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发表时间：
2017-12-21
影响因子：
16.6
通讯作者：
Adachi C
中科院分区：
文献类型：
--
作者：
Cui LS;Ruan SB;Bencheikh F;Nagata R;Zhang L;Inada K;Nakanotani H;Liao LS;Adachi C
有机发光二极管由于其理想的特性已经成为主流显示技术。第三代电致发光器件通过一种称为热激活延迟荧光的机制发光，目前正受到广泛关注。然而，不令人满意的装置稳定性仍然是该领域中未解决的问题。在这里，我们证明了电子传输n型主机，其中通常包括在其化学结构中的受体部分，具有内在的能力，以平衡的电荷通量和扩大的复合区在延迟荧光有机电致发光器件，而在同一时间防止形成高能量激子。n型主体使绿色和蓝色延迟荧光器件的寿命分别延长> 30倍和1000倍。结果表明，n型基质适合于实现稳定的延迟荧光有机电致发光器件。基于热激活延迟荧光的OLED显示出高的荧光效率，但寿命差。在本文中，Cui等人证明了使用n型主体分子可以分别使绿色和蓝色OLED的器件寿命增加30倍和1000倍。
Organic light-emitting diodes have become a mainstream display technology because of their desirable features. Third-generation electroluminescent devices that emit light through a mechanism called thermally activated delayed fluorescence are currently garnering much attention. However, unsatisfactory device stability is still an unresolved issue in this field. Here we demonstrate that electron-transporting n-type hosts, which typically include an acceptor moiety in their chemical structure, have the intrinsic ability to balance the charge fluxes and broaden the recombination zone in delayed fluorescence organic electroluminescent devices, while at the same time preventing the formation of high-energy excitons. The n-type hosts lengthen the lifetimes of green and blue delayed fluorescence devices by > 30 and 1000 times, respectively. Our results indicate that n-type hosts are suitable to realize stable delayed fluorescence organic electroluminescent devices. OLEDs based on thermally activated delayed fluorescence have shown high fluorescence efficiency but poor lifetime. Herein, Cui et al. demonstrate that the use of n-type host molecules can increase the device lifetime by 30 times and 1000 times for green and blue OLEDs, respectively.
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影响因子：
29.4
作者：
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通讯作者：
Zysman-Colman, Eli
影响因子：
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影响因子：
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作者：
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