吩恶嗪
系统间交叉
部分
有机发光二极管
哒嗪
光化学
接受者
荧光
分子
化学
电化学
材料科学
纳米技术
吩噻嗪
立体化学
物理化学
有机化学
单重态
激发态
核物理学
电极
物理
药理学
医学
量子力学
图层(电子)
凝聚态物理
作者
Simonas Krotkus,Tomas Matulaitis,Stefan Diesing,Graeme Copley,Emily Archer,Chang‐Min Keum,David B. Cordes,Alexandra M. Z. Slawin,Malte C. Gather,Eli Zysman‐Colman,Ifor D. W. Samuel
标识
DOI:10.3389/fchem.2020.572862
摘要
Three novel donor-acceptor molecules comprising the underexplored pyridazine (Pydz) acceptor moiety have been synthesized and their structural, electrochemical and photophysical properties thoroughly characterized. Combining Pydz with two phenoxazine donor units linked via a phenyl bridge in a meta configuration ( dPXZMePydz ) leads to high reverse intersystem crossing rate k RISC = 3.9 · 10 6 s −1 and fast thermally activated delayed fluorescence (TADF) with <500 ns delayed emission lifetime. Efficient triplet harvesting via the TADF mechanism is demonstrated in OLEDs using dPXZMePydz as the emitter but does not occur for compounds bearing weaker donor units.
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