18513763. LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE simplified abstract (SEMICONDUCTOR ENERGY LABORATORY CO., LTD.)

LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE

Organization Name

SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor(s)

Satoshi Seo of Sagamihara (JP)

Takahiro Ishisone of Atsugi (JP)

Nobuharu Ohsawa of Zama (JP)

Yusuke Nonaka of Atsugi (JP)

Toshiki Sasaki of Isehara (JP)

LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18513763 titled 'LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE

Simplified Explanation

The emission efficiency of a light-emitting element is improved by incorporating a second light-emitting layer with a peak in the yellow wavelength region, containing a phosphorescent material, a first organic compound, and a second organic compound that form an exciplex.

• Pair of electrodes and EL layer between them
• EL layer includes a first light-emitting layer with a fluorescent material and a host material
• EL layer also includes a second light-emitting layer with a phosphorescent material, a first organic compound, and a second organic compound forming an exciplex
• Emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region

Potential Applications

The technology could be applied in:

• OLED displays
• Lighting applications
• Signage

Problems Solved

• Improved emission efficiency
• Enhanced color quality
• Increased brightness

Benefits

• Energy efficiency
• Brighter and more vibrant colors
• Longer lifespan

Potential Commercial Applications

Optimizing Light-Emitting Elements for Enhanced Efficiency and Color Quality

Possible Prior Art

No prior art is known at this time.

Unanswered Questions

How does the exciplex formation impact the overall performance of the light-emitting element?

The exciplex formation could potentially influence the efficiency and stability of the device by affecting charge transport and recombination processes.

What are the specific organic compounds used in the second light-emitting layer and how do they contribute to the emission spectrum?

The specific organic compounds used in the second light-emitting layer are not disclosed in the abstract, leaving a gap in understanding their role in achieving the desired emission spectrum.

Original Abstract Submitted

Emission efficiency of a light-emitting element is improved. The light-emitting element has a pair of electrodes and an EL layer between the pair of electrodes. The EL layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer includes a fluorescent material and a host material. The second light-emitting layer includes a phosphorescent material, a first organic compound, and a second organic compound. An emission spectrum of the second light-emitting layer has a peak in a yellow wavelength region. The first organic compound and the second organic compound form an exciplex.