A new family of indole-fused multi-resonance thermally activated delayed fluorescence materials have been developed, which exhibit narrowband blue emission with a small full width at half maximum of 22–23 nm. High maximum external quantum efficiencies of up to 16.8% have been achieved in organic light-emitting diodes. Furthermore, it is unveiled that peripheral substitutions can not only promote device efficiency but also help to maintain narrowband emission under high dopant concentrations.

中文翻译：

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吲哚稠合 BN-杂芳烃作为有机发光二极管的窄带蓝色发射体

已开发出一类新的吲哚融合多共振热激活延迟荧光材料，其表现出窄带蓝色发射，半峰全宽小，为 22-23 nm。有机发光二极管的最大外量子效率高达 16.8%。此外，据透露，外围替代不仅可以提高器件效率，还有助于在高掺杂浓度下保持窄带发射。