Synthesis and Electroluminescent Characteristics of Red Phosphorescent Iridium(III) Complexes for Highly Efficient Organic Light-Emitting Diodes
作者:Seo Yun Lee、Song Eun Lee、Ye Na Oh、Hyun Jung Baek、Young Kwan Kim、Dong Myung Shin
DOI:10.1166/jnn.2017.14122
日期:2017.8.1
The new red phosphorescent iridium(III) complexes, (DMP-MDCPQ)2Ir(tmd), (MTP-MQ)2Ir(tmd) were synthesized for highly efficient red organic light-emitting diodes (OLEDs). The main ligands consisted of electron-donor (3,5-dimethylphenyl), (5-methylthiophene) and electron-acceptor (4-methyl-7,8-dihydro-6H-cyclopenta[g]quinoline), 4-methylquinoline were synthesized by suzuki coupling reaction. The iridium(III) complexes based on main ligands and 2,2,6,6-tetramethyl-3,5-heptanedione(tmd) ancillary ligands were synthesized by Nonoyama reaction and measured by nuclear magnetic resonance (NMR). Also, their luminescence property was investigated by UV-visible spectroscopy and photoluminescence spectroscopy in dichloromethane (DCM) solvent. The manufactured OLEDs devices were characterized by investigation of current density–voltage– luminance, power efficiency, external quantum efficiency, EL spectrum. The iridium(III) complexes will be used as highly efficient dopants for the red OLEDs.
新型红色磷光铱(III)复合物(DMP-MDCPQ)2Ir(tmd)和(MTP-MQ)2Ir(tmd)被合成用于高效红色有机发光二极管(OLEDs)。主要配体由电子给体(3,5-二甲基苯)和(5-甲基噻吩)及电子受体(4-甲基-7,8-二氢-6H-环戊烯[g]喹啉)和4-甲基喹啉通过铃木偶联反应合成。基于主要配体和2,2,6,6-四甲基-3,5-庚二酮(tmd)辅助配体的铱(III)复合物通过Nonoyama反应合成,并采用核磁共振(NMR)进行测定。同时,它们的发光特性通过在二氯甲烷(DCM)溶剂中的紫外-可见光光谱和光致发光光谱进行研究。制造的OLED器件通过电流密度-电压-亮度特性、电源效率、外量子效率和电致发光光谱进行表征。这些铱(III)复合物将用作高效红色OLED的掺杂剂。