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Citation: ZHANG Qi-Sheng, ZHOU Quan-Guo, CHENG Yan-Xiang, MA Dong-Ge, WANG Li-Xiang. Phosphorescent Organic Light-Emitting Diodes Based on a Red Cu(Ⅰ) Complex[J]. Chinese Journal of Applied Chemistry, ;2006, 23(5): 570-572. shu

Phosphorescent Organic Light-Emitting Diodes Based on a Red Cu(Ⅰ) Complex

1.
a State Key Laboratory of Polymer Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
b Graduate School of the Chinese Academy of Sciences, Beijing

Corresponding author: CHENG Yan-Xiang,
Received Date: 3 June 2005
Available Online: 8 October 2005
Fund Project: 科技部"九七三"项目(2002CB613401) (2002CB613401)国家自然科学基金(20474062)资助项目 (20474062)

The photoluminescence and electroluminescence properties of red Cu(Ⅰ) complex (BF₄)(dbp=2,9-Di-tert-butyl-1,10-phenanthroline;dmp=2,9-Dimethyl-1,10-phenanthroline) were studied.The film of 20% Cu(Ⅰ) complex in PMMA exhibited a photoluminescence quantum yield of 5% with emission maximum at 617 nm.A short excited-state lifetime of 1.7 μs was also observed.Phosphorescent OLEDs with red emission identical to photoluminescence spectrum of the complex in PMMA film were fabricated by using poly vinyl carbazole(PVK) as host.A current efficiency of 0.9 cd/A along with a maximum brightness up to 631 cd/m² was demonstrated.The triplet-triplet(T-T) annihilation under a high current density was not significant for these devices and might be attributed to the short excited-state lifetime of the complex.
- organic light-emitting,
- phosphorescence,
- Cu(Ⅰ) complex,
- red emission
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