An Electroactive Pure Organic Room‐Temperature Phosphorescence Polymer Based on a Donor‐Oxygen‐Acceptor Geometry,Angewandte Chemie International Edition

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An Electroactive Pure Organic Room‐Temperature Phosphorescence Polymer Based on a Donor‐Oxygen‐Acceptor Geometry
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-08 , DOI: 10.1002/anie.202011957
Junqiao Ding ₁

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An electroactive room‐temperature phosphorescence (RTP) polymer has been demonstrated based on a characteristic donor‐oxygen‐acceptor geometry. Compared with the donor–acceptor reference, the inserted oxygen atom between donor and acceptor can not only decrease hole‐electron orbital overlap to suppress the charge transfer fluorescence, but also strengthen spin‐orbital coupling effect to facilitate the intersystem crossing and subsequent phosphorescence channels. As a result, a significant RTP is observed in solid states under photo excitation. Most noticeably, the corresponding polymer light‐emitting diodes (PLEDs) reveal a dominant electrophosphorescence with a record‐high external quantum efficiency of 9.7 %. The performance goes well beyond the 5 % theoretical limit for typical fluors, opening a new door to the development of pure organic RTP polymers towards efficient PLEDs.

中文翻译：

基于供体-氧-受体几何结构的电活性纯有机室温磷光聚合物

已经基于特征性的供体-氧-受体几何结构论证了一种电活性室温磷光（RTP）聚合物。与施主-受主参考相比，施主和受主之间插入的氧原子不仅可以减少空穴-电子轨道重叠以抑制电荷转移荧光，而且可以增强自旋-轨道耦合效应，从而促进系统间的穿越和随后的磷光通道。结果，在光激发下以固态观察到显着的RTP。最引人注目的是，相应的聚合物发光二极管（PLED）显示出主要的电致磷光，其外部量子效率达到了创纪录的9.7％。该性能远远超出了典型氟化物的5％理论极限，

更新日期：2020-10-08

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