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US 2005/0233166 A1Published application
OLED device using reduced drive voltage
AssigneeEastman Kodak Company
InventorsMichele Ricks, Tukaram Hatwar, Jeffrey Spindler, Michael Boroson
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Abstract
An OLED device includes an anode, a first light-emitting layer disposed over the anode, and a second light-emitting layer disposed over the first light-emitting layer. The device also includes a metal-doped organic layer containing an organic electron-transporting material and a low work function metal disposed over the second light-emitting layer, and a cathode disposed over the metal-doped organic layer.
Claims37
An OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode;
- c) a second light-emitting layer disposed over the first light-emitting layer;
- d) a metal-doped organic layer containing an organic electron-transporting material and a low work function metal disposed over the second light-emitting layer;
- and
- e) a cathode disposed over the metal-doped organic layer.
3 more elements
An OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode;
- c) a second light-emitting layer disposed in contact with the first light-emitting layer;
- d) a metal-doped organic layer containing an organic electron-transporting material and a low work function metal disposed over the second light-emitting layer, wherein the metal-doped organic layer is spaced in a range of from 5 to 50 nm from the interface between the first and second light-emitting layers;
- and
- e) a cathode disposed over the metal-doped organic layer.
3 more elements
An OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode;
- c) a second light-emitting layer disposed on the first light-emitting layer;
- d) a metal-doped organic layer containing an organic electron transporting material and a low-work function metal disposed over the second light-emitting layer, wherein the distance between the metal-doped organic layer and the interface between the first and second light-emitting layers is selected to achieve a desired color;
- and
- e) a cathode disposed over the metal-doped organic layer.
3 more elements
A white light-emitting OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode;
- c) a second light-emitting layer disposed in contact with the first light-emitting layer;
- d) a third light-emitting layer disposed in contact with the second light-emitting layer;
- e) a metal-doped organic layer containing an organic electron transporting material and a low work function metal disposed over the third light-emitting layer, wherein the metal-doped organic layer is spaced in a range of from 5 to 50 nm from the interface between the second and third light-emitting layers;
- and
- f) a cathode disposed over the metal-doped organic layer, thereby emitting white light.
4 more elements
A white light-emitting OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode;
- c) a second light-emitting layer disposed in contact with the first light-emitting layer;
- d) a third light-emitting layer disposed in contact with the second light-emitting layer;
- e) a metal-doped organic layer containing an organic electron transporting material and a low work function metal disposed over the third light-emitting layer, wherein the distance between the metal-doped organic layer and the interface between the second and third light-emitting layers is selected in order to produce the desired white light;
- and
- f) a cathode disposed over the metal-doped organic layer.
4 more elements
A white light-emitting OLED device comprising:
- a) an anode;
- b) a first light-emitting layer disposed over the anode, wherein the first light-emitting layer contains a hole-transporting material and a light-emitting material that emits light in the yellow to red portion of the spectrum;
- c) a second light-emitting layer disposed on the first light-emitting layer, wherein the second light-emitting layer contains a blue to blue-green light-emitting material that emits light in the blue to blue-green portions of the spectrum;
- d) a third light-emitting layer on the second light-emitting layer, wherein the third light-emitting layer contains an electron transporting material and has a thickness in a range of from 5 to 20 nm;
- e) a metal-doped organic layer containing an organic electron transporting material and a low-work function metal, disposed in contact with the third light-emitting layer;
- and
- f) a cathode disposed over the metal-doped organic layer.
4 more elements
Dependencies are inferred from the claim text.