18154471. ORGANIC LIGHT-EMITTING DEVICE simplified abstract (Samsung Display Co., Ltd.)
Contents
ORGANIC LIGHT-EMITTING DEVICE
Organization Name
Inventor(s)
ORGANIC LIGHT-EMITTING DEVICE - A simplified explanation of the abstract
This abstract first appeared for US patent application 18154471 titled 'ORGANIC LIGHT-EMITTING DEVICE
Simplified Explanation
The patent application describes an organic light-emitting device and display apparatus that includes multiple sub-emission layers to emit light of different wavelengths. These sub-emission layers do not overlap each other and consist of a first sub-emission layer with a first color light-emitting dopant and a second sub-emission layer with a second color light-emitting dopant. The sub-emission layers also contain a host material that facilitates the transport of holes and electrons, forming an exciplex with a triplet energy equal to or greater than the dopants' triplet energies.
- The device includes a first electrode, a second electrode, and an emission layer between them.
- A hole control layer is present between the first electrode and the emission layer.
- An electron control layer is present between the emission layer and the second electrode.
- The emission layer consists of multiple sub-emission layers that emit light of different wavelengths.
- The sub-emission layers do not overlap each other.
- The first sub-emission layer contains a first color light-emitting dopant.
- The second sub-emission layer contains a second color light-emitting dopant.
- Both sub-emission layers contain a host material that forms an exciplex with the dopants.
- The triplet energy of the exciplex is equal to or greater than the dopants' triplet energies.
Potential applications of this technology:
- Display devices with improved color reproduction and efficiency.
- Lighting applications where precise control over emitted light wavelengths is required.
- Flexible and wearable displays that can produce a wide range of colors.
Problems solved by this technology:
- Overlapping emission layers can lead to color mixing and reduced color accuracy in organic light-emitting devices. This technology avoids such issues by using non-overlapping sub-emission layers.
- The exciplex formation between the host material and dopants helps to improve the efficiency and stability of the device.
Benefits of this technology:
- Enhanced color accuracy and reproduction in organic light-emitting devices.
- Improved efficiency and stability due to exciplex formation.
- Potential for a wide range of applications, including displays and lighting.
Original Abstract Submitted
An organic light-emitting device and display apparatus, the device including a first electrode; a second electrode facing the first electrode; an emission layer between the first and second electrode; a hole control layer between the first electrode and the emission layer; and an electron control layer between the emission layer and the second electrode, wherein the emission layer includes a plurality of sub-emission layers to emit light having different wavelengths, at least portions of the plurality of sub-emission layers do not overlap one another, the plurality of sub-emission layers include: a first sub-emission layer including a first color light-emitting dopant, and a second sub-emission layer including a second color light-emitting dopant, the first and second sub-emission layers each include a hole-transporting and electron-transporting host which form an exciplex, and a triplet energy of the exciplex is equal to or greater than triplet energies of the first and second color light-emitting dopant.
