Light-emitting device
The light-emitting device configuration with a specific layered structure of organic compounds addresses the challenges of low efficiency, short lifespan, and high voltage, achieving enhanced performance and reliability.
JP2025092633AInactive Publication Date: 2025-06-19SEMICON ENERGY LAB CO LTD
Patent Information
- Application Number
- JP2025055397
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2018-11-29
- Filing Date
- 2025-03-28
- Publication Date
- 2025-06-19
- Estimated Expiration
- Not applicable · inactive patent
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Figure 2025092633000001_ABST
Abstract
To provide a novel light-emitting device, a light-emitting device with an excellent light-emission efficiency, a light-emitting device with a desirable life, or a light-emitting device with a low driving voltage.SOLUTION: An EL layer sequentially includes a first layer, a second layer, a third layer, a light-emitting layer, and a fourth layer in ascending order of proximity to a positive electrode. The first layer includes a first organic compound and a second organic compound. The fourth layer includes a seventh organic compound. The first organic compound shows the electronic acceptability to the second organic compound. The second organic compound has an HOMO level of -5.7 eV to -5 .2 eV, both inclusive. The electron mobility when the square root of the electric field intensity [V / cm] of the seventh organic compound is 600 is in the range of 1×10-7 cm2 / Vs to 5×10-5 cm2 / Vs, both inclusive.SELECTED DRAWING: Figure 1
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Citation Information
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