Organic light emitting device
View Patent ↗An organic light emitting device that has improved lifespan properties by improving the characteristics of an interface between at least one of a red emissive layer, a green emissive layer or a blue emissive layer, and an electron transport layer, and a method of manufacturing the organic light emitting device.
1. An organic light emitting device comprising:
a substrate;
a first electrode on the substrate;
a second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode, and comprising an emissive layer and an electron transport layer,
wherein the emissive layer comprises: a red emissive layer, a green emissive layer, and a blue emissive layer,
wherein the electron transport layer comprises: a first electron transport layer comprising at least one selected from the group consisting of a first layer on the red emissive layer and having substantially the same pattern as that of the red emissive layer, a second layer on the green emissive layer and having substantially the same pattern as that of the green emissive layer, and a third layer on the blue emissive layer and having substantially the same pattern as that of the blue emissive layer; and a second electron transport layer on the first electron transport layer as a common layer with respect to red, green, and blue sub-pixels, and
wherein the first electron transport layer comprises the first layer, the second layer, and the third layer.
2. An organic light emitting device comprising:
a substrate;
a first electrode on the substrate;
second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode, and comprising an emissive layer and an electron transport layer,
wherein the emissive layer comprises: a red emissive layer, a green emissive layer, and a blue emissive layer,
wherein the electron transport layer comprises: a first electron transport layer comprising at least one selected from the group consisting of a first layer on the red emissive layer and having substantially the same pattern as that of the red emissive layer, a second layer on the green emissive layer and having substantially the same pattern as that of the green emissive layer, and a third layer on the blue emissive layer and having substantially the same pattern as that of the blue emissive layer; and a second electron transport layer on the first electron transport layer as a common layer with respect to red, green, and blue sub-pixels, and
wherein the first layer is on the red emissive layer, and the second electron transport layer is on the first layer; the second layer is on the green emissive layer, and the second electron transport layer is on the second layer; and the third layer is on the blue emissive layer, and the second electron transport layer is on the third layer.
3. An organic light emitting device comprising:
a substrate;
a first electrode on the substrate;
a second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode, and comprising an emissive layer and an electron transport layer,
wherein the emissive layer comprises: a red emissive layer, a green emissive layer, and a blue emissive layer,
wherein the electron transport layer comprises: a first electron transport layer comprising at least one selected from the group consisting of a first layer on the red emissive layer and having substantially the same pattern as that of the red emissive layer, a second layer on the green emissive layer and having substantially the same pattern as that of the green emissive layer, and a third layer on the blue emissive layer and having substantially the same pattern as that of the blue emissive layer; and a second electron transport layer on the first electron transport layer as a common layer with respect to red, green, and blue sub-pixels, and
wherein the thicknesses of the first layer, the second layer, and the third layer are substantially identical to one another.
4. An organic light emitting device comprising:
a substrate;
a first electrode on the substrate;
a second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode, and comprising an emissive layer and an electron transport layer,
wherein the emissive layer comprises: a red emissive layer, a green emissive layer, and a blue emissive layer,
wherein the electron transport layer comprises: a first electron transport layer comprising at least one selected from the group consisting of a first layer on the red emissive layer and having substantially the same pattern as that of the red emissive layer, a second layer on the green emissive layer and having substantially the same pattern as that of the green emissive layer, and a third layer on the blue emissive layer and having substantially the same pattern as that of the blue emissive layer; and a second electron transport layer on the first electron transport layer as a common layer with respect to red, green, and blue sub-pixels, and
wherein a thickness ratio of the first layer to the second electron transport layer, a thickness ratio of the second layer to the second electron transport layer, and a thickness ratio of the third layer to the second electron transport layer are in the range from about 1:9 to about 4:6.