发明授权
- 专利标题: Organic electroluminescent device with a high resistant inorganic electron injecting layer
- 专利标题(中): 具有高电阻无机电子注入层的有机电致发光器件
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申请号: US09234704申请日: 1999-01-21
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公开(公告)号: US06281627B1公开(公告)日: 2001-08-28
- 发明人: Michio Arai , Isamu Kobori , Etsuo Mitsuhashi , Hiroshi Yamamoto
- 申请人: Michio Arai , Isamu Kobori , Etsuo Mitsuhashi , Hiroshi Yamamoto
- 优先权: JP11-013666 19990121
- 主分类号: H01J162
- IPC分类号: H01J162
摘要:
To realize an organic EL device having an excellent electron injection efficiency, improved luminous efficiency, low operating voltage, and low cost, the invention provides an organic EL device comprising a hole injecting electrode, an electron injecting electrode, and at least one organic layer between the electrodes, at least one of the organic layer having a light emitting function. The device further has a high resistance inorganic electron injecting layer between the electron injecting electrode and the organic layer. The high resistance inorganic electron injecting layer contains as a first component an oxide of at least one element selected from alkali metal elements, alkaline earth metal elements and lanthanide elements, having a band gap of up to 4 eV and as a second component at least one element selected from Ru, V, Zn, Sm, and In and is capable of blocking holes and has conduction paths for carrying electrons.
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