发明授权
- 专利标题: Organic electroluminescence layer with oligomer hole injection layer
- 专利标题(中): 有机电致发光层与低聚物空穴注入层
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申请号: US09446905申请日: 2000-03-24
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公开(公告)号: US06437373B1公开(公告)日: 2002-08-20
- 发明人: Toshio Sakai , Chishio Hosokawa , Hisayuki Kawamura
- 申请人: Toshio Sakai , Chishio Hosokawa , Hisayuki Kawamura
- 优先权: JP10-125819 19980508
- 主分类号: H05B3304
- IPC分类号: H05B3304
摘要:
The present invention is to provide an organic EL element which can secure the durability by which to endure the pulse driving and which has an excellent heat resistance. In an organic electroluminescence element in which a luminous layer and a hole injection layer are formed between an anode and a cathode, the hole injection layer is formed using an oligomer having a phenylenediamine structure and having a glass transition temperature of 110° C. or more, and an intermediate layer is formed between the hole injection layer and the anode to inhibit a chemical reaction in an interface between the anode and the hole injection layer. Consequently, it is possible to remarkably improve the heat resistance of the element, to secure the excellent durability capable of enduring severe driving conditions, and to realize the prolongation of life of the element.
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