Triplet energy tuning from 2.48 eV to 2.94 eV by just a simple change of heteroatom in the ligand structure of Be complexes was studied using azole based triplet host materials. Three Be organometallic host materials with azole type ligands were synthesized and could be used as the host materials from red to deep blue phosphorescent organic light-emitting diodes. High quantum efficiency was obtained in red, green, blue and deep blue devices using the Be complexes. In particular, a high quantum efficiency of 26.1% was achieved in blue phosphorescent organic light-emitting diodes.
利用基于唑的三重宿主材料,研究了仅通过简单改变
铍配合物
配体结构中的杂原子,就能将三重能从 2.48 eV 调整到 2.94 eV 的问题。研究人员合成了三种带有唑类
配体的 Be 有机
金属宿主材料,可用作从红色到深蓝色
磷光有机发光二极管的宿主材料。使用这些 Be 复合物可在红色、绿色、蓝色和深蓝色器件中获得较高的量子效率。其中,蓝色
磷光有机发光二极管的量子效率高达 26.1%。