Organic electroluminescent element
View Patent ↗Three light-emitting units are included. Two light-emitting units of the three light-emitting units are similar-color light-emitting units that emit light in a similar color, and have mutually different luminance lives. A remaining light-emitting unit of the three light-emitting units is a different-color light-emitting unit that emits light in a color that is different from the similar color, and has a luminance life that is shorter than each luminance life of the two similar-color light-emitting units.
1. An organic electroluminescent element, comprising:
a light transmissive electrode;
a light reflective electrode;
three light-emitting units being provided between the light transmissive electrode and the light reflective electrode;
the three light-emitting units being stacked in layers;
an interlayer being provided between adjoining light-emitting units, and configured to inject an electrical charge into each light-emitting unit adjacent thereto;
two light-emitting units of the three light-emitting units being similar-color light-emitting units that emit light in a similar color, and that have mutually different luminance lives; and
a remaining light-emitting unit of the three light-emitting units being a different-color light-emitting unit that emits light in a color that is different from the similar color, and that has a luminance life that is shorter than each luminance life of the two similar-color light-emitting units.
2. The organic electroluminescent element according to claim 1 , wherein
the different-color light-emitting unit comprises a light-emitting layer containing a blue light-emitting material.
3. The organic electroluminescent element according to claim 1 , wherein
the different-color light-emitting unit comprises a light-emitting layer containing a fluorescent material as a light-emitting material.
4. The organic electroluminescent element according to claim 1 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers that differ in layered structure or composition.
5. The organic electroluminescent element according to claim 1 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers containing a phosphorescent material as a light-emitting material.
6. The organic electroluminescent element according to claim 1 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers containing both a red light-emitting material and a green light-emitting material.
7. The organic electroluminescent element according to claim 1 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers which contain light-emitting materials and each of which contains at least one identical light-emitting material.
8. The organic electroluminescent element according to claim 1 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers which contain light-emitting materials and each of which contains at least one different light-emitting material.
9. The organic electroluminescent element according to claim 2 , wherein
the different-color light-emitting unit comprises a light-emitting layer containing a fluorescent material as the blue light-emitting material.
10. The organic electroluminescent element according to claim 2 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers that differ in layered structure or composition.
11. The organic electroluminescent element according to claim 2 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers containing a phosphorescent material as a light-emitting material.
12. The organic electroluminescent element according to claim 2 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers containing both a red light-emitting material and a green light-emitting material.
13. The organic electroluminescent element according to claim 2 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers which contain light-emitting materials and each of which contains at least one identical light-emitting material.
14. The organic electroluminescent element according to claim 2 , wherein
the two similar-color light-emitting units comprise respective light-emitting layers which contain light-emitting materials and each of which contains at least one different light-emitting material.