Ionic multiresonant thermally activated delayed fluorescence emitters for light emitting electrochemical cells
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY(2022)
摘要
We designed and synthesized two new ionic thermally activated delayed fluorescent (TADF) emitters that are charged analogues of a known multiresonant TADF (MR-TADF) compound, DiKTa. The emission of the charged derivatives is red-shifted compared to the parent compound. For instance, DiKTa-OBuIm emits in the green (lambda PL = 499 nm, 1 wt % in mCP) while DiKTa-DPA-OBuIm emits in the red (lambda PL = 577 nm, 1 wt % in mCP). In 1 wt % mCP films, both emitters showed good photoluminescence quantum yields of 71% and 61%, and delayed lifetimes of 316.6 mu s and 241.7 mu s, respectively, for DiKTa-OBuIm and DiKTa-DPA-OBuIm, leading to reverse intersystem crossing rates of 2.85 x 103 s-1 and 3.04 x 103 s-1. Light-emitting electrochemical cells were prepared using both DiKTa-OBuIm and DiKTa-DPA-OBuIm as active emitters showing green (lambda max = 534 nm) and red (lambda max = 656 nm) emission, respectively.
更多查看译文
关键词
electroluminescence, light-emitting electrochemical cells, multiresonance, purely organic emitters, thermally activated delayed fluorescence
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要