Light emitting device

Details Light emitting device Light emitting device

2008-01-08

2010-06-01

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S504000

Reexamination Certificate

active

07728518

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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