High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules
High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules
复制标题
DOI：
10.1063/1.4749285
复制
发表时间：
2012-08-27
影响因子：
4
通讯作者：
Adachi, Chihaya
中科院分区：
文献类型：
--
作者：
Lee, Sae Youn;Yasuda, Takuma;Adachi, Chihaya
我们设计并合成了一种高效的纯有机发光材料，2，4-双{3-（9 H-咔唑-9-基）-9H-咔唑-9-基}-6-苯基-1，3，5-三嗪（CC 2 TA），它包含联咔唑给体和苯基三嗪受体单元，能够发射热激活延迟荧光。CC 2 TA的分子设计允许HOMO和LUMO分别在供体和受体片段上的空间分离，导致异常小的单重态-三重态交换能（Δ E-ST = 0.06 eV）以及高的三重态能量。此外，在使用CC 2 TA作为发射体的天蓝色有机发光二极管中，已经实现了高达11% ± 1%的高外电致发光量子效率。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4749285]
We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9H-carbazol-9-yl)-9H-carbazol-9-yl}-6-phenyl-1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (Delta E-ST = 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11% +/- 1% has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749285]