A simple strategy to construct pure-red multiple resonance (MR) emitters was successfully implemented. The proof-of-concept molecule PPZ-BN achieves a significant redshift of more than 125 nm compared to the selected parent MR core. The corresponding narrowband red organic light-emitting diode shows a high external quantum efficiency of 26.9 %, a small efficiency roll-off, and an excellent operation stability.

中文翻译：

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纯红色多共振发射器的简单分子设计策略

成功实施了构建纯红色多共振 (MR) 发射器的简单策略。与选定的母体 MR 核心相比，概念验证分子 PPZ-BN 实现了超过 125 nm 的显着红移。相应的窄带红色有机发光二极管显示出26.9%的高外量子效率、小的效率滚降和优异的工作稳定性。