JPH103990A5 - - Google Patents

Description

[0005]
[Means for solving the problem]
To achieve the above object, the present invention provides an organic EL light-emitting device having a plurality of light-emitting pixels, each of which is formed by sequentially stacking a substrate electrode, an organic layer having a light-emitting layer, and a counter electrode, on a substrate, the light-emitting layer having a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer, the blue light-emitting layer having a region in which a blue phosphor is contained in a blue light-emitting material, the green light-emitting layer having a region in which a blue or green light-emitting material is contained in a green phosphor, and the red light-emitting layer having a region in which a blue light-emitting material is contained in a red phosphor. For example, the blue light-emitting layer, the green light-emitting layer, and the red light-emitting layer are stacked in this order in the light-emitting layer.

In a further preferred embodiment, the organic EL light-emitting device is characterized in that the light-emitting layer is formed by repeating one or more layers each having a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer, for example, stacked in this order .

Claims (8)

An organic EL light-emitting device in which a plurality of light-emitting pixels formed by sequentially laminating a substrate electrode, an organic material layer having a light-emitting layer, and a counter electrode are separately arranged on a substrate,
An organic EL light-emitting device, characterized in that the light-emitting layer has a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer, the blue light-emitting layer has a region in which a blue light-emitting body contains a blue phosphor, the green light-emitting layer has a region in which a blue light-emitting body or a green light-emitting body contains a green phosphor, and the red light-emitting layer has a region in which a blue light-emitting body contains a red phosphor. 2. The organic EL light-emitting device according to claim 1, wherein the light-emitting layer comprises a blue light-emitting layer, a green light-emitting layer, and a red light-emitting layer in this order. 3. The organic EL light-emitting device according to claim 1 , wherein the content of the phosphor relative to the light-emitting material in each of the light-emitting layers is 0.1 to 10 mol %. 4. The organic EL light-emitting device according to claim 1 , wherein the blue light-emitting substance is a distyrylarylene-based compound represented by the following formula (I):
[In the formula, ^R1 to ^R4 each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 18 carbon atoms, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted cyclohexyl group, a substituted or unsubstituted aryloxy group having 6 to 18 carbon atoms, or a substituted or unsubstituted pyridyl group. Here, the substituents are alkyl groups having 1 to 6 carbon atoms, alkoxy groups having 1 to 6 carbon atoms, aralkyl groups having 7 to 18 carbon atoms, aryloxy groups having 6 to 18 carbon atoms, acyl groups having 1 to 6 carbon atoms, acyloxy groups having 1 to 6 carbon atoms, carboxyl groups, styryl groups, arylcarbonyl groups having 6 to 20 carbon atoms, aryloxycarbonyl groups having 6 to 20 carbon atoms, alkoxycarbonyl groups having 1 to ⁶ carbon atoms, vinyl groups, anilinocarbonyl groups, carbamoyl groups, phenyl groups, nitro groups, hydroxyl groups, or halogen atoms. These substituents may be single or multiple. ^R1 to R4 may be the same or different from each other, and ^R1 and ^R2 , and ^R3 and ^R4 may combine with the groups that substitute them to form a substituted or unsubstituted, saturated or unsaturated five-membered ring or a substituted or unsubstituted, saturated or unsaturated six-membered ring. Ar represents a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, and may be singly or multiply substituted, and the bonding site may be ortho, para, or meta. The substituents are the same as those described above. The substituents of the arylene group may be bonded to each other to form a substituted or unsubstituted saturated or unsaturated five-membered ring or a substituted or unsubstituted saturated or unsaturated six-membered ring. However, when Ar is unsubstituted phenylene, R ¹ to R ⁴ are each selected from an alkoxy group having 1 to 6 carbon atoms, an aralkyl group having 7 to 18 carbon atoms, a substituted or unsubstituted naphthyl group, a biphenyl group, a cyclohexyl group, and an aryloxy group. 5. The organic EL light-emitting device according to claim 1, wherein at least one of the substrate electrode and the counter electrode is light-transmitting, and a color filter layer is disposed on the surface of the light-transmitting electrode on the side on which the organic layer including the light-emitting layer is not formed. 6. An organic EL light-emitting device according to claim 1, wherein at the interface formed by two of the three regions containing the light-emitting material and the phosphor, each of the two opposing regions includes a portion containing a common organic compound. 7. The organic EL light-emitting device according to claim 1, wherein each of the three regions containing the light-emitting material and the phosphor has a thickness of 0.1 to 50 nm. 8. The organic EL light-emitting device according to claim 1, wherein the light-emitting layer is formed by repeating a laminate of a blue light-emitting layer, a green light-emitting layer and a red light-emitting layer one or more times.