Patent ID: 6411019
Filing Date: 2002-06-25
Classification: H01L,Y10S

Abstract:
An electroluminescent device for displaying an image to a viewer in front of said device, comprising:an anode layer; a cathode layer, at least one of said anode layer and said cathode layer being said front and being substantially transparent to electroluminescent light; an organic electroluminescent layer disposed between said cathode layer and said anode layer, said electroluminescent layer having a highest occupied molecular orbital associated with an anode side, and a lowest unoccupied molecular orbital associated with a cathode side; and an optical interference member for reducing the reflectance of ambient light towards said viewer, said member disposed between said anode layer and said cathode layer, said optical interference member having a work function, such that a first difference between said work function and a first energy level required to remove an electron from said highest occupied molecular orbital when said optical interference member is at said anode side approaches zero, and a second difference between said work function and a second energy level required to remove an electron from said lowest unoccupied molecular orbital when said optical interference member is at said cathode side approaches zero.