Nitrogen-containing fused ring compounds, their applications, and organic electroluminescent devices
By using nitrogen-containing condensed ring compounds with specific structures as electron transport materials in OLED devices, the problems of high driving voltage and low current efficiency of existing OLED devices are solved, and lower driving voltage and higher luminous efficiency are achieved.
CN116554201BActive Publication Date: 2025-05-27BEIJING GREEN GUARDEE TECH +1
Patent Information
- Application Number
- CN202210107084.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-28
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2042-01-28
AI Technical Summary
Technical Problem
Existing OLED devices have problems with high driving voltage and low current efficiency, and it is necessary to develop high-performance electronic transmission materials to reduce driving voltage and improve luminous efficiency.
Method used
A nitrogen-containing fused ring compound is provided as an electron transport material whose structure is specific to a specific nitrogen heterocyclic group and oxygen or sulfur atoms for use as a material for an electron transport layer in an organic electroluminescent device.
Benefits of technology
By using the nitrogen-containing condensed ring compound as the electron transport material, the driving voltage of the OLED device can be effectively reduced and the luminous efficiency can be improved.
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Figure CN116554201B_ABST
Abstract
The present invention relates to a nitrogen-containing fused ring compound, its application, and an organic electroluminescent device. The nitrogen-containing fused ring compound is represented by Formula I, where X and Y are the same or different and each independently is oxygen or sulfur; n is 1 or 2; R 1 and R 2 are the same or different and each independently is an alkyl group, an aryl group, or a heteroaryl group, and R 1 and R 2 and among R 1 and R 2 at least one is a heteroaryl group having a nitrogen heterocycle, and the nitrogen-containing heterocycle is selected from one or more of a pyrimidine ring, a quinoxaline ring, a quinazoline ring, and a triazine ring; L 1 and L 2 are the same or different and each independently is selected from absent, an arylene group, and a heteroarylene group. When the nitrogen-containing fused ring compound of the present invention is applied to an organic electroluminescent device, it has a lower driving voltage and higher device luminous efficiency.
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Citation Information
Patent Citations
Nitrogen-containing organic compound, application thereof and organic light-emitting device
CN111518126A
Nitrogen-containing condensed ring compound, organic thin film and organic thin film element
JP2011184324A