Invention Grant
- Patent Title: Light emitting device
- Patent Title (中): 发光装置
-
Application No.: US12008062Application Date: 2008-01-08
-
Publication No.: US07728518B2Publication Date: 2010-06-01
- Inventor: Shuhei Yoshitomi , Junichiro Sakata , Masahiro Takahashi
- Applicant: Shuhei Yoshitomi , Junichiro Sakata , Masahiro Takahashi
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell Sanders LLP
- Priority: JP2003-019545 20030128
- Main IPC: H01J1/62
- IPC: H01J1/62

Abstract:
In order to provide a light emitting device which consistently emits light at the time of continuous driving in addition to obtain light emission having a high color purity in each of red, green and blue, a light emitting element according to the present invention, in which an organic compound film comprising a hole transporting material, an electron transporting material, a first impurity (first doping material), and a second impurity (second doping material) is provided between an anode and a cathode, is characterized in that the organic compound film is laminated with a first mixed region comprising the hole transporting material and the first impurity, a hole transporting region comprising the hole transporting material, a second mixed region comprising the electron transporting material and the second impurity, and an electron transporting region comprising the electron transporting material in order from the side of the anode.
Public/Granted literature
- US20080185599A1 Light emitting element and manufacturing method thereof Public/Granted day:2008-08-07
Information query