CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian Province, P. R. China.
Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Science, Xiamen, 361021, P. R. China.
Angew Chem Int Ed Engl. 2017 Nov 20;56(47):15006-15009. doi: 10.1002/anie.201709125. Epub 2017 Oct 24.
Two efficient blue thermally activated delayed fluorescence compounds, B-oCz and B-oTC, composed of ortho-donor (D)-acceptor (A) arrangement were designed and synthesized. The significant intramolecular D-A interactions induce a combined charge transfer pathway and thus achieve small ΔE and high efficiencies. The concentration quenching can be effectively inhibited in films of these compounds. The blue non-doped organic light emitting diodes (OLEDs) based on B-oTC prepared from solution processes shows record-high external quantum efficiency (EQE) of 19.1 %.
两种高效的蓝色热激活延迟荧光化合物 B-oCz 和 B-oTC，由邻位供体（D）-受体（A）排列组成，被设计和合成。显著的分子内 D-A 相互作用诱导了一个组合的电荷转移途径，从而实现了小的ΔE 和高效率。在这些化合物的薄膜中，可以有效地抑制浓度猝灭。基于溶液工艺制备的 B-oTC 的蓝色无掺杂有机发光二极管（OLED）显示出创纪录的高外量子效率（EQE）为 19.1%。
