发明名称 |
Light-emitting element, display device, and electronic appliance |
摘要 |
The present invention provides a light-emitting element having a structure in which the drive voltage is comparatively low and a light-emitting element in which the increase in the drive voltage over time is small. Further, the present invention provides a display device in which the drive voltage and the increase in the drive voltage over time are small and which can resist long-term use. A layer in contact with an electrode in a light-emitting element is a layer containing a P-type semiconductor or a hole-generating layer such as an organic compound layer containing a material having electron-accepting properties. The light-emitting layer is sandwiched between the hole-generating layers, and an electron-generating layer is sandwiched between the light-emitting layer and the hole-generating layer on a cathode side.
|
申请公布号 |
US7964891(B2) |
申请公布日期 |
2011.06.21 |
申请号 |
US20080273044 |
申请日期 |
2008.11.18 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
KUMAKI DAISUKE;SEO SATOSHI |
分类号 |
H01L27/15;H01L51/50 |
主分类号 |
H01L27/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|