Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence.
Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence.
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DOI：
10.1038/srep02127
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发表时间：
2013
影响因子：
4.6
通讯作者：
Adachi C
中科院分区：
文献类型：
--
作者：
Nakanotani H;Masui K;Nishide J;Shibata T;Adachi C
有机发光二极管 (OLED) 由于具有高电致发光 (EL) 效率、灵活性和低成本制造的潜力，对下一代显示器和照明应用很有吸引力。尽管含有铱或铂等稀有金属的磷光发射体可生产具有高EL效率的器件，但这些金属价格昂贵，而且它们的蓝色发射在实际应用中仍然不可靠。最近，展示了一种使用通过热激活延迟荧光 (TADF) 发射的材料实现高 EL 效率的新途径。然而，目前尚不清楚通过三线态激子贡献的 TADF 发射的装置是否可靠。在这里，我们展示了高效、稳定的 OLED，通过控制载流子复合区的位置，通过 TADF 发光，从而实现与基于三(2-苯基吡啶)铱 (III) 的参考 OLED 相当的预计寿命。我们的结果表明，TADF 在电激励下本质上是稳定的，周围材料的优化将提高器件的可靠性。
Organic light-emitting diodes (OLEDs) are attractive for next-generation displays and lighting applications because of their potential for high electroluminescence (EL) efficiency, flexibility and low-cost manufacture. Although phosphorescent emitters containing rare metals such as iridium or platinum produce devices with high EL efficiency, these metals are expensive and their blue emission remains unreliable for practical applications. Recently, a new route to high EL efficiency using materials that emit through thermally activated delayed fluorescence (TADF) was demonstrated. However, it is unclear whether devices that emit through TADF, which originates from the contributions of triplet excitons, are reliable. Here we demonstrate highly efficient, stable OLEDs that emit via TADF by controlling the position of the carrier recombination zone, resulting in projected lifetimes comparable to those of tris(2-phenylpyridinato)iridium(III)-based reference OLEDs. Our results indicate that TADF is intrinsically stable under electrical excitation and optimization of the surrounding materials will enhance device reliability.
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DOI：
10.1109/2944.669481
发表时间：
1998-01-01
影响因子：
4.9
作者：
Murata, H;Merritt, CD;Kafafi, ZH
通讯作者：
Kafafi, ZH
影响因子：
3.2
作者：
Goushi, K;Kwong, R;Adachi, C
通讯作者：
Adachi, C
影响因子：
3.2
作者：
Schroegel, Pamela;Langer, Nicolle;Strohriegl, Peter
通讯作者：
Strohriegl, Peter
影响因子：
29.4
作者：
Su, Shi-Jian;Gonmori, Eisuke;Kido, Junji
通讯作者：
Kido, Junji
影响因子：
4
作者：
Kwong, RC;Nugent, MR;Brown, JJ
通讯作者：
Brown, JJ