Organic light emitting device

Patent metadata

Field	Value
Publication number	US-12441937-B2
Application number	US-202117518539-A
Country	US
Kind code	B2
Filing date	Nov 3, 2021
Priority date	Dec 28, 2020
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

The present disclosure relates to an organic light emitting device that includes a substrate, and an organic light emitting diode positioned on the substrate and including a first electrode, a second electrode facing the first electrode, and a first emitting material layer including a first dopant of a boron derivative and a first host of an anthracene derivative and positioned between the first and second electrodes, wherein the first host is deuterated.

First claim

What is claimed is:

1. An organic light emitting device, comprising:
a substrate; and
an organic light emitting diode positioned on the substrate and including:
a first electrode;
a second electrode facing the first electrode;
a first emitting material layer including a first dopant of a boron derivative and a first host of an anthracene derivative and positioned between the first electrode and the second electrode;
a hole injection layer between the first electrode and the first emitting material layer;
a hole transporting layer between the hole injection layer and the first emitting material layer; and
an electron blocking layer between the hole transporting layer and the first emitting material layer,
wherein the first dopant is one of compounds in Formula 3:

wherein the first host is represented by Formula 2:

wherein in Formula 2,
each of Ar1 and Ar2 is independently C 6 to C 30 aryl group benzo[b]naphtho[2,3-d]furan or benzo[b]naphtho[1,2-d]furan, and L is a single bond or C 6 to C 30 arylene group,
wherein a is an integer of 0 to 8, each of b, c and d is independently an integer of 0 to 30,
wherein a, b, c and d are a positive integer, and
wherein at least one of the hole injection layer and the hole transporting layer includes a material represented by Formula 5, and the electron blocking layer includes a material represented by Formula 6:

2. The organic light emitting device of claim 1 , wherein the first host is one of compounds in Formula 4:

3. The organic light emitting device of claim 1 , wherein the organic light emitting diode further includes:
a second emitting material layer including a second dopant of a boron derivative and a second host of an anthracene derivative and positioned between the first emitting material layer and the second electrode; and
a first charge generation layer between the first emitting material layer and the second emitting material layer.

4. The organic light emitting device of claim 3 , wherein the second dopant is one of compounds in Formula 3, and the second host is represented by Formula 2.

5. The organic light emitting device of claim 4 , wherein a red pixel, a green pixel, and a blue pixel are defined on the substrate, and the organic light emitting diode corresponds to each of the red pixel, the green pixel, and the blue pixel, and
wherein the organic light emitting device further includes:
a color conversion layer disposed between the substrate and the organic light emitting diode or on the organic light emitting diode and corresponding to the red pixel and the green pixel.

6. The organic light emitting device of claim 3 , wherein the organic light emitting diode further includes:
a third emitting material layer emitting a yellow-green light and positioned between the first charge generation layer and the second emitting material layer; and
a second charge generation layer between the second emitting material layer and the third emitting material layer.

7. The organic light emitting device of claim 3 , wherein the organic light emitting diode further includes:
a third emitting material layer emitting a red light and a green light and positioned between the first charge generation layer and the second emitting material layer; and
a second charge generation layer between the second emitting material layer and the third emitting material layer.

8. The organic light emitting device of claim 3 , wherein the organic light emitting diode further includes:
a third emitting material layer including a first layer and a second layer and positioned between the first charge generation layer and the second emitting material layer; and
a second charge generation layer between the second emitting material layer and the third emitting material layer,
wherein the first layer emits a red light, and the second layer emits a yellow-green light.

9. The organic light emitting device of claim 8 , wherein the third emitting material layer further includes a third layer emitting a green light.

10. The organic light emitting device of claim 1 , wherein the organic light emitting diode further includes:
a second emitting material layer emitting a yellow-green light and positioned between the first emitting material layer and the second electrode; and
a first charge generation layer between the first emitting material layer and the second emitting material layer.

11. The organic light emitting device of claim 6 , wherein a red pixel, a green pixel, and a blue pixel are defined on the substrate, and the organic light emitting diode corresponds to each of the red pixel, the green pixel, and the blue pixel, and
wherein the organic light emitting device further includes:
a color filter layer disposed between the substrate and the organic light emitting diode or on the organic light emitting diode and corresponding to the red pixel, the green pixel, and the blue pixel.

12. The organic light emitting device of claim 1 , wherein a red pixel, a green pixel and a blue pixel are defined on the substrate, and the organic light emitting diode corresponds to each of the red pixel, the green pixel, and the blue pixel, and
wherein the organic light emitting device further includes:
a color conversion layer disposed between the substrate and the organic light emitting diode or on the organic light emitting diode and corresponding to the red pixel and the green pixel.

Assignees

• Lg Display Co Ltd

Inventors

• Choi Su-Na
• Song In-Bum
• Seo Jeong-Dae

Classifications

• H10K85/322

  comprising boron · CPC title

• H10K85/658 Primary

  Organoboranes · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K2101/10

  Triplet emission · CPC title

• H10K50/19

  Tandem OLEDs · CPC title