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US 2004/0061435 A1Published application
High work function metal alloy cathode used in organic electroluminescent devices
AssigneeEastman Kodak Company
InventorsLiang-Sheng Liao, Joseph K. Madathil, Pranab K. Raychaudhuri
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Abstract
An organic electroluminescent device including an anode, an electroluminescent medium, and a metal alloy cathode comprising at least two metals, wherein all the metals of the alloy have their work function higher than 4.0 eV.
Claims9
An organic electroluminescent device comprising, in sequence:
- a) an anode;
- b) an electroluminescent medium;
- and
- c) a metal alloy cathode comprising at least two metals, wherein all the metals of the alloy have their work function higher than 4.0 eV.
1 more element
An organic electroluminescent device comprising, in sequence:
- a) an anode;
- b) an electroluminescent medium;
- c) a metal alloy cathode comprising at least two metals, wherein all the metals of the alloy have their work function higher than 4.0 eV;
- and
- d) an electron-injecting layer in contact with the metal alloy cathode and part of the electroluminescent medium.
2 more elements
A method of making an OLED device, comprising the steps of:
- a) providing an anode;
- b) forming an electroluminescent medium;
- c) forming a metal cathode by thermal evaporation of two or more separated metal sources, or by electron beam evaporation of two or more separated metal sources, or by sputtering of a metal alloy target, wherein all the metals of the alloy have their work function higher than 4.0 eV;
- and
- d) an electron-injecting layer in contact with the metal alloy cathode and part of the electroluminescent medium.
2 more elements
Dependencies are inferred from the claim text.