发明名称 |
Light-emitting element, light-emitting device using the light-emitting element, and electric appliance using the light-emitting device |
摘要 |
A light-emitting element is disclosed with a light-emitting layer containing a host material added with a small amount of guest material, wherein color purity can be improved as well as reduced a driving voltage. Color purity can be improved as well as reduced a driving voltage especially in a light-emitting element added with a red light-emitting material as a guest material. A light-emitting layer is disclosed that includes a first host material, which is an organic compound having a hole transporting property; a second host material, which is an organic compound having a larger dipole moment than that of the first host material; and a guest material having an electron-withdrawing group.
|
申请公布号 |
US2005088083(A1) |
申请公布日期 |
2005.04.28 |
申请号 |
US20040967267 |
申请日期 |
2004.10.19 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. |
发明人 |
SEO SATOSHI;ABE HIROKO;IKEDA HISAO |
分类号 |
H01J1/62;H01L51/00;H01L51/50;H05B33/12;H05B33/14;H05B33/20;(IPC1-7):H01J1/62 |
主分类号 |
H01J1/62 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|