一种含载流子传输基的铱配合物:合成及深黄色电致磷光器件

摘要

A novel Ir-complex (BPPBI)2Ir (ECTFBD) (HBPPBI =2-(biphenyl-4-yl)- 1-phenyl- 1H-benzo [d]imidazole,HECTFBD=1-(9-ethyl-9H-carbazol-3-yl)-4,4,4-trifluorobutane-1,3-dione) containing carrier transport moieties was synthesized and characterized by 1H NMR and elemental analysis.The photophysical and electrochemical properties of (BPPBI)2Ir(ECTFBD) in dichloromethane were investigated.The Ir-complex-based electroluminescent devices were fabricated.The structure of devices was ITO/MoO3 (10 nm)/NPB (80 nm)/CBP∶ x％ (BPPBI)2Ir (ECTFBD) (20 nm)/TPBi (45 nm)/LiF/Al [x％∶ 4％ and 7％ doping concentration by weight; NPB=N4,N4' -di (naphthalen-1-yl)-N4,N4'-diphenylbiphenyl-4,4'-diamine,CBP=4,4'-di(9H-carbazol-9-yl)biphenyl,TPBi=1,3,5-tris (1-phenyl-1H-benzo[d]imidazol-2-yl)benzene].Deep yellow emission from the emissive layer was obtained.For the device at 7 wt％ doping concentration,the maximum current efficiency and the maximum brightness were 5.2 cd·A-1 and 8 690 cd·m-2,respectively.%合成了一种含有载流子传输基新的铱配合物(BPPBI)2Ir(ECTFBD)[HBPPBI∶1-苯基-2-(4-联苯基)苯并咪唑,HECTFBD∶1-(9-乙基-3-咔唑基)-4,4,4-三氟-1,3-丁二酮],其结构和组成经核磁共振氢谱和元素分析所证实.研究了这种铱配合物二氯甲烷溶液的光物理和电化学性质.制作了基于这种铱配合物的电致磷光器件.器件结构是ITO/MoO3(10 nm)/NPB(80 nm)/CBP∶x％(BPPBI)2Ir(ECTFBD)(20 nm)/TPBi(45 nm)/LiF/Al[x％∶质量百分比为4％和7％的掺杂浓度；NPB∶NPB,N4'-二(1-萘基)-N4,N4'-二苯基-4,4'联苯二胺,CBP∶4,4'-二(9-咔唑基)联苯,TPBi(∶)1,3,5-三(2-(1-苯基)苯并咪唑基)苯].这些器件显示出深黄色的发射.对于7％掺杂浓度器件,最大的电流效率和最大发光亮度分别是5.2 cd· A-1和8 690 cd· m-2.