Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Reexamination Certificate
2006-05-30
2006-05-30
Nelms, David (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
C257S013000
Reexamination Certificate
active
07053402
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.
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Sakata Junichiro
Takahashi Masahiro
Yoshitomi Shuhei
Cook Alex McFarron Manzo Cummings & Mehler, Ltd.
Nelms David
Nguyen Thinh T
Semiconductor Energy Laboratory Co,. Ltd.
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