Solution-Processible Brilliantly Luminescent Eu<sup>III</sup>Complexes with Host-Featured Phosphine Oxide Ligands for Monochromic Red-Light-Emitting Diodes
作者:Jianzhe Wang、Chunmiao Han、Guohua Xie、Ying Wei、Qin Xue、Pengfei Yan、Hui Xu
DOI:10.1002/chem.201403244
日期:2014.8.25
their Eu3+ complexes, which is outstanding among conjugated Eu3+ complexes. Density function theory (DFT) simulations and electrochemical analysis further verified the contributions of DPEPOArn to the carrier injecting/transporting ability of the complexes. In this sense, these functionalized PO ligands served as hosts in optoelectronic processes, which rendered the self‐host feature of their Eu3+ complexes
通过自宿主策略构建了一系列溶液可处理的电致发光(EL)Eu 3+络合物,其中采用中性配体作为官能化的二齿氧化膦(PO)配体,命名为DPEPOAr n(DPEPO = bis(2-(二苯基膦基) )苯基)醚氧化物)。由于有机成分比例的增加,这些配合物的溶解度得到了显着改善。这进一步增强了这些配体在单重态和三重态能量转移过程中的天线效应,以支持其Eu 3+络合物的高达86%的高光致发光量子产率(PLQYs),这在共轭Eu 3+中是出色的复合体。密度泛函理论(DFT)模拟和电化学分析进一步验证了DPEPOAr n对复合物载流子注入/传输能力的贡献。从这个意义上讲,这些功能化的PO配体在光电过程中充当宿主,这赋予了Eu 3+络合物的自宿主特征。与它们的含Eu 3+的红色发光聚合物相比,这些复合物的旋转涂覆的单层有机发光二极管(OLED)具有增强的电性能,实现了改善的低驱动电压,例如约6 V的启动电压。类似物。[Eu(DBM)3