中国物理B ›› 2008, Vol. 17 ›› Issue (5): 1911-1915.doi: 10.1088/1674-1056/17/5/061

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Organic light emitting diodes using magnesium doped organic acceptor as electron injection layer and silver as cathode

曹国华, 秦大山, 关 敏, 曹峻松, 曾一平, 李晋闽   

  1. Novel Materials Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2007-08-11 修回日期:2007-10-17 出版日期:2008-05-20 发布日期:2008-05-20

Organic light emitting diodes using magnesium doped organic acceptor as electron injection layer and silver as cathode

Cao Guo-Hua(曹国华), Qin Da-Shan(秦大山)†, Guan Min(关敏), Cao Jun-Song(曹峻松), Zeng Yi-Ping(曾一平)‡, and Li Jin-Min(李晋闽)   

  1. Novel Materials Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2007-08-11 Revised:2007-10-17 Online:2008-05-20 Published:2008-05-20

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摘要： Organic light emitting diodes employing magnesium doped electron acceptor 3, 4, 9, 10 perylenetetracarboxylic dianhydride (Mg:PTCDA) as electron injection layer and silver as cathode were demonstrated. As compared to Mg:Ag cathode, the combination of the Mg:PTCDA layer and silver provided enhanced electron injection into tris (8-quinolinolato) aluminium. The device with 1:2 Mg:PTCDA and Ag showed an increase of about 12% in the maximum current efficiency, mainly due to the improved hole-electron balance, and an increase of about 28% in the maximum power efficiency, as compared to the control device using Mg:Ag cathode. The properties of Mg:PTCDA composites were studied as well.

Abstract: Organic light emitting diodes employing magnesium doped electron acceptor 3, 4, 9, 10 perylenetetracarboxylic dianhydride (Mg:PTCDA) as electron injection layer and silver as cathode were demonstrated. As compared to Mg:Ag cathode, the combination of the Mg:PTCDA layer and silver provided enhanced electron injection into tris (8-quinolinolato) aluminium. The device with 1:2 Mg:PTCDA and Ag showed an increase of about 12% in the maximum current efficiency, mainly due to the improved hole-electron balance, and an increase of about 28% in the maximum power efficiency, as compared to the control device using Mg:Ag cathode. The properties of Mg:PTCDA composites were studied as well.

Key words: organic light emitting diodes, Mg:PTCDA, electron injection

中图分类号:  (Light-emitting devices)

  • 85.60.Jb
85.60.Bt (Optoelectronic device characterization, design, and modeling)