Metal-Ligand Compound for OLED Voltage Stability
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Solution Overview
Problem
There is a need to improve the performance of organic semiconductor materials and devices, particularly in achieving stable operating voltage over time, which is affected by the characteristics of compounds used in the organic semiconductor layer of OLEDs.
Innovation Solution
A compound of formula (I) is introduced, comprising a metal ion (M) coordinated with a ligand (L) and an ancillary ligand (AL), where the metal ion is selected from specific alkali, alkaline earth, group III to V, or transition metals, and the ligand is designed to enhance the stability and efficiency of the organic electronic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconductor compounds are used in OLEDs, then the device structure and basic functionality are maintained, but the operating voltage stability over time deteriorates
Solution Approach 1:
The patent introduces a novel compound with formula (I) containing a metal ion M coordinated with a ligand L and ancillary ligand AL. This compound features specific molecular parameters including a beta-dicarbonyl group with delocalized negative charge, and R1 groups that can be various substituents. By changing the chemical composition and molecular structure parameters of the organic semiconductor layer, the operating voltage stability over time is significantly improved while maintaining device functionality
Solution Approach 2:
The invention uses a composite compound structure where a metal ion (M) is coordinated with a ligand (L) and an ancillary ligand (AL). This composite molecular structure combines the benefits of metal coordination chemistry with organic ligand flexibility, creating a material that provides both structural integrity and improved voltage stability in the OLED device
2Reliability
If the characteristics of compounds in the organic semiconductor layer are improved, then voltage stability is enhanced, but the device complexity increases
Solution Approach 1:
The patent applies local quality by introducing specific functional groups and substituents at particular positions within the molecular structure. The R1 groups can be independently selected from various substituents, allowing optimization of specific molecular regions to enhance voltage stability without requiring complete redesign of the entire compound structure
Solution Approach 2:
The invention modifies specific parameters of the organic semiconductor compound, such as the metal ion selection (M), the ligand structure (L), and the ancillary ligand (AL), to achieve improved voltage stability. These controlled parameter changes allow enhancement of device performance while maintaining a manageable level of structural complexity
Data Source
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AI summary
The present invention relates to an organic electronic device comprising a semiconductor layer which comprises a compound of formula (1).