A High-Efficiency Deep Blue Emitter for OLEDs with a New Dual-Core Structure Incorporating ETL Characteristics
作者:Yeongjae Heo、Hyukmin Kwon、Sangwook Park、Sunwoo Dae、Hayoon Lee、Kiho Lee、Jongwook Park
DOI:10.3390/molecules28227485
日期:——
materials exhibited maximum photoluminescence wavelengths at 433 and 443 nm in solution and emitted deep blue light with high photoluminescence quantum yields of 82% and 88%, respectively. When used as the emitting layer in non-doped devices, TPO-AP outperformed AP-TPO, achieving a current efficiency of 5.49 cd/A and an external quantum efficiency of 4.26% in electroluminescence. These materials introduce
在本研究中,我们引入了弱电子接受恶唑衍生物4,5-二苯基-2-(4-(4,4,5,5-四甲基-1,3,2-二氧杂硼杂环戊二烯-2-基)苯基)恶唑(TPO) 成双核结构的蒽和芘部分。最终,我们开发了2-(4-(6-(蒽-9-基)芘-1-基)苯基)-4,5-二苯基恶唑(AP-TPO)作为第二核芘的取代物,4 ,5-二苯基-2-(4-(10-(芘-1-基)蒽-9-基)苯基)恶唑(TPO-AP)作为第一个核心蒽的取代基。两种材料在溶液中均表现出最大光致发光波长为433和443 nm,并发出深蓝光,光致发光量子产率分别为82%和88%。当用作非掺杂器件的发光层时,TPO-AP的电致发光电流效率优于AP-TPO,电流效率为5.49 cd/A,外量子效率为4.26%。这些材料在有机发光二极管领域引入了一种新的深蓝色发射器,结合了与电子传输层相关的特性。