期刊
SYNTHETIC METALS
卷 162, 期 5-6, 页码 448-452出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2012.01.003
关键词
Organic light emitting diodes; Cyclic arylamines; Hole-transporting; Deep-blue emission
资金
- Development Fund for Electronic and Information Industry
- Science and Technology Commission of Shanghai Municipality [10dz1140502]
- Education Commission of Shanghai Municipality [12ZZ091]
- National Natural Science Foundation of China [60906019, 61136003]
We have developed two kinds of cyclic arylamines functioning as hole-transporting and light-emitting materials of organic light emitting diodes (OLEDs), respectively. The hole-transporting cyclic arylamine (C1)-based device exhibited an improved maximum luminance efficiency of 4.21 cd/A, utilizing a single light-emitting layer of tris(8-hydroxyquinolinato) aluminum. While the maximum luminance efficiencies for N,N'-bis-(naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) and 4,4',4 ''-tris-N-naphthyl-N-phenylamino-triphenylamine/NPB-based devices were 2.28 and 3.02 cd/A, respectively. In addition, a non-doped deep-blue (448 nm) light-emitting device was obtained, employing cyclic arylamine (C2) as emission layer. And the exciplex formation occurred at C1/C2 interface or in the emission layer of C2 doped C1, which leaded to a wide EL emission. Furthermore, we have developed a very simple bluish-white OLED using C2 (5 wt.%) doped C1, which showed particularly wide full width at half maximum of 135 nm. (C) 2012 Elsevier B.V. All rights reserved.
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