Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics
Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics
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DOI：
10.1021/jacs.0c10081
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发表时间：
2020-11-18
影响因子：
15
通讯作者：
Yasuda, Takuma
中科院分区：
文献类型：
--
作者：
Yang, Minlang;Park, In Seob;Yasuda, Takuma
在这里，我们证明了电子接受三配位硼和电子捐赠咔唑亚基到多环芳烃（PAH）的战略实施产生了一个家庭的有吸引力的全色发光体，可以发出窄带和有效的热激活延迟荧光（TADF）。一个多功能的模块化设计，这些硼和咔唑嵌入多环芳烃可以促进系统的调制其物理和光电性能。利用这些多环芳烃作为TADF发射体的有机发光二极管表现出从蓝色到红色的窄带电致发光，对于蓝色、绿色和红色分别实现了29.3%、31.8%和22.0%的高最大外量子效率。
Herein, we demonstrate that the strategic implementation of electron-accepting tricoordinate boron and electron-donating carbazole subunits into polycyclic aromatic hydrocarbons (PAHs) produces a family of attractive full-color luminophores that can emit narrowband and efficient thermally activated delayed fluorescence (TADF). A versatile modular design for these boron- and carbazole-embedded PAHs can facilitate the systematic modulation of their photophysical and optoelectronic properties. Organic light-emitting diodes that utilize these PAHs as TADF emitters demonstrate narrowband electroluminescence from blue to red, achieving high maximum external quantum efficiencies of 29.3%, 31.8%, and 22.0% for blue, green, and red, respectively.