Organic light emitting display device
View Patent ↗An organic light emitting display device is disclosed. The device includes a substrate; a first electrode formed on the substrate; an organic layer including at least an emission layer and formed on the first electrode; and a second electrode formed on the organic layer. The emission layer includes a host and a dopant material. The dopant is one of materials having the structure of Formula 1, where R may be one selected from the group consisting of ethylene, an ethylene derivative, stilbene, a stilbene derivative. Also, R1 to R6 may be different from or equal to each other, and each is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 to C 20 alkyl group, a substituted or unsubstituted C 1 to C 20 alkoxy group, a substituted or unsubstituted C 5 to C 20 aryl group, a C 3 to C 30 heterocyclic group, and an aliphatic C 3 to C 30 hydrocarbon group.
1. An organic light emitting display device (OLED), comprising:
a first electrode;
a second electrode; and
a light-emitting layer interposed between the first and second electrodes, the light-emitting layer comprising a host and a dopant, the dopant comprising
a compound represented by Formula 2:
2. The OLED of claim 1 , wherein the dopant comprises a compound represented by Formula 3:
wherein R is one selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 to C 20 alkyl group, a substituted or unsubstituted C 1 to C 20 alkoxy group, a substituted or unsubstituted C 5 to C 20 aryl group, a C 3 to C 30 heterocyclic group, and an aliphatic C 3 to C 30 hydrocarbon group, and
wherein X is one selected from the group consisting of a naphthyl group, a biphenyl group, phenylnaphthalene, phenylanthracene and their derivatives.
3. The OLED of claim 2 , wherein the host comprises binaphthyl methylanthracene.
4. The OLED of claim 1 , wherein the dopant is in an amount from about 1 wt % to about 20 wt % with reference to the total weight of the host and the dopant.
5. The OLED of claim 1 , further comprising at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer and an electron injection layer, the at least one layer being interposed between the first and second electrodes.
6. The OLED of claim 1 , wherein the light-emitting layer is a green light emitting layer.
7. An electronic device comprising the OLED of claim 1 .
8. An organic light emitting display device (OLED), comprising:
a substrate; and
an array of pixels formed over the substrate, each of the pixels comprising sub-pixels configured to emit light of different colors, at least one of the sub-pixels comprising a light-emitting layer which comprises a host and a dopant, the dopant comprising
a compound represented by Formula 2:
9. The OLED of claim 8 , wherein another of the sub-pixels comprises a light-emitting layer which comprises a host and a dopant, the dopant comprising a red light-emitting material.
10. The OLED of claim 8 , wherein another of the sub-pixels comprises a light-emitting layer which comprises a host and a dopant, the dopant comprising a blue light-emitting material.
11. The OLED of claim 8 , wherein the host comprises a compound represented by Formula 3:
wherein R is one selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C 1 to C 20 alkyl group, a substituted or unsubstituted C 1 to C 20 alkoxy group, a substituted or unsubstituted C 5 to C 20 aryl group, a C 3 to C 30 heterocyclic group, and an aliphatic C 3 to C 30 hydrocarbon group, and
wherein X is one selected from the group consisting of a naphthyl group, a biphenyl group, phenylnaphthalene, phenylanthracene and their derivatives.
12. The OLED of claim 11 , wherein the compound represented by Formula 3 comprises binaphthyl methylanthracene.
13. The OLED of claim 8 , wherein the dopant is in an amount from about 1 wt % to about 20 wt % with reference to the total weight of the host and the dopant.
14. The OLED of claim 8 , wherein each of the sub-pixels further comprises a first electrode and a second electrode such that the light-emitting layer is interposed therebetween, and wherein the second electrodes of the sub-pixels are electrically connected to one another.
15. The OLED of claim 14 , wherein at least one of the sub-pixels further comprises a hole injection layer and/or a hole transport layer between the first electrode and the light-emitting layer.
16. The OLED of claim 14 , wherein at least one of the sub-pixels further comprises an electron transport layer and/or an electron injection layer between the second electrode and the light-emitting layer.
17. A method of making an organic light emitting display device, the method comprising:
forming a first electrode over a substrate;
forming an organic layer over the substrate, the organic layer comprising a host;
doping the organic layer with a dopant; and
forming a second electrode over the organic layer,
wherein the dopant comprises
a compound represented by Formula 2:
18. The method of claim 17 , wherein the dopant is in an amount from about 1 wt % to about 20 wt % with reference to the total weight of the host and the dopant.