发明申请
- 专利标题： Phosphorescent oled with mixed electron transport materials
- 专利标题（中）： 磷光与混合电子传输材料
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申请号： US11116096申请日： 2005-04-27
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公开(公告)号： US20060246315A1公开(公告)日： 2006-11-02
- 发明人: William Begley , Tukaram Hatwar , Joseph Deaton , Christopher Brown , Natasha Andrievsky , Marina Kondakova
- 申请人： William Begley , Tukaram Hatwar , Joseph Deaton , Christopher Brown , Natasha Andrievsky , Marina Kondakova
- 主分类号： H01L51/54
- IPC分类号： H01L51/54 ; H05B33/12
摘要：
An OLED device comprises, in sequence, an anode, a light-emitting layer that comprises a phosphorescent light-emitting organometallic compound, a hole-blocking layer, and a cathode, and between the hole-blocking layer and the cathode, a further layer containing: a) a first compound that has the lowest LUMO value of the compounds in the layer, the amount being greater than or equal to 10% by volume and less than 100% by volume of the layer; b) at least one second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound, the total amount of said compound(s) being less than or equal to 90% by volume and more than 0% by volume of the layer. Such a device provides improved drive voltage.
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