期刊
ORGANIC ELECTRONICS
卷 13, 期 12, 页码 3050-3059出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2012.08.032
关键词
Blue material; Anthracene; Phenanthroimidazole; Organic light-emitting devices
资金
- Wuhan Science and Technology Bureau [01010621227]
- Doctoral Fund of the Ministry of Education of China [20100142120049]
- NSFC/China [21161160442]
A series of new blue materials based on highly fluorescent di(aryl) anthracene and electron-transporting phenanthroimidazole functional cores: 2-(4-(anthracen-9-yl)phenyl)-1-phenyl- 1H-phenanthro[9,10-d]imidazole (ACPI), 2-(4-(10-(naphthalen-1-yl)anthracen-9-yl) phenyl)-1-p-henyl-1H-phenanthro[9,10-d]imidazole (1-NaCPI), 2-(4-(10-(naphthalen-2- yl)anthracen-9-yl)phenyl)-1-phenyl-1H-phenanthro[9,10-d]imidazole (2-NaCPI) were designed and synthesized. These materials exhibit good film-forming and thermal properties as well as strong blue emission in the solid state. To explore the electroluminescence properties of these materials, three layer, two layer and single layer organic light-emitting devices were fabricated. With respect to the three layer device 4 using ACPI as the emitting layer, its maximum current efficiency reaches 4.36 cd A(-1) with Commission Internationale del'Eclairage (CIE) coordinates of (0.156, 0.155). In the single layer device 10 based on ACPI, maximum current efficiency reaches 1.59 cd A(-1) with Commission Internationale del'Eclairage (CIE) coordinates of (0.169, 0.177). Interestingly, both device 4 and 10 has low turn on voltage and negligible efficiency roll off at high current densities. (C) 2012 Elsevier B.V. All rights reserved.
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