Organic light-emitting diode and display device using same
AssigneeLG Display Co., Ltd.
InventorsWook Song, Yu Jeong Lee
Life of this patent
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Abstract
An organic light-emitting diode and a display device using the same are provided. An organic light-emitting diode includes: a hole injection layer, a hole transport layer on the hole injection layer, a first emission layer configured to generate light of a short wavelength in a visible band, the first emission layer being on the hole transport layer, wherein one or more of the hole injection layer and the hole transport layer includes a phosphorescent dopant material at an interface between the hole injection layer and the hole transport layer.
Claims17
An organic light-emitting diode, comprising:
- a hole injection layer;
- a hole transport layer on the hole injection layer;
- and
- a first emission layer configured to generate light of a short wavelength in a visible band, the first emission layer being on the hole transport layer,
- wherein one or more of the hole injection layer and the hole transport layer comprises a phosphorescent dopant material at an interface between the hole injection layer and the hole transport layer,
- wherein the first emission layer is configured to emit blue light, and
- wherein the phosphorescent dopant material is configured to absorb the blue light to generate triplet excitons that are combined with holes at the interface between the hole injection layer and the hole transport layer.
An organic light-emitting diode, comprising:
- an anode electrode;
- a cathode electrode;
- a first stack comprising:
- a hole injection layer on the anode electrode,
- a hole transport layer on the hole injection layer,
- a first emission layer on the hole transport layer, the first emission layer being configured to emit light having a peak wavelength within a range of 430 nm to 480 nm, and
- wherein one or more of the hole injection layer and the hole transport layer comprises a phosphorescent dopant material at an interface between the hole injection layer and the hole transport layer;
- and
- a second stack between the cathode electrode and the first stack, the second stack comprising at least one second emission layer configured to emit light having a wavelength longer than a wavelength of light emitted from the first emission layer,
- wherein the interface between the hole injection layer and the hole transport layer is configured to:
- absorb light from the first emission layer using the phosphorescent dopant material, and
- emit light having a wavelength of 550 nm or more in a visible band.
A display device, comprising:
- a display panel in which pixels displaying an input image are arranged;
- and
- a display panel driver configured to write pixel data of the input image to the pixels of the display panel,
- wherein each of the pixels comprises:
- an organic light-emitting diode, comprising:
- a hole injection layer,
- a hole transport layer on the hole injection layer, and
- a first emission layer configured to generate light of a short wavelength in a visible band, the first emission layer being on the hole transport layer, and
- a phosphorescent dopant material added to at least one of:
- the hole injection layer and the hole transport layer at an interface between the hole injection layer and the hole transport layer,
- wherein the first emission layer is configured to emit blue light, and
- wherein the interface between the hole injection layer and the hole transport layer is configured to absorb the blue light to generate triplet excitons that are combined with holes.
Dependencies are inferred from the claim text.