Organic Light Emitting Device Luminance Life via Crosslinked Layers
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Solution Overview
Problem
Existing light emitting devices, such as organic electroluminescent devices, face limitations in luminance life and require improvement to enhance their performance.
Innovation Solution
A light emitting device is designed with a specific configuration including an anode, cathode, first organic layer, and second organic layer, where the first organic layer contains a compound represented by formula (C-1) and the second organic layer contains a compound represented by formula (C-1) and a cross-linked body of a crosslinkable material, with specific structural elements and phosphorescent compounds to optimize luminance life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a conventional organic electroluminescent device structure is used, then the device can be manufactured with standard processes, but the luminance life is insufficient
Solution Approach 1:
The patent introduces specific compounds with defined molecular structures (formulas C-1 and C-2) and controls their concentrations within specific ranges (0.1-10 wt% and 1-50 wt%) to optimize the organic layers' properties, thereby improving luminance life while maintaining performance stability
Solution Approach 2:
The patent creates composite organic layers by combining multiple materials: host compounds (C-1), dopant compounds (C-2), crosslinkable materials, and phosphorescent compounds. This composite structure enhances both luminance life and reliability by synergistically combining the functions of each material
2Duration of action of stationary object
If the organic layer composition is optimized for luminance life, then the luminance life improves, but the device structure becomes more complex
Solution Approach 1:
The patent designs organic layers that perform multiple functions simultaneously: the host compound (C-1) provides both the organic layer matrix and facilitates charge transport, while the dopant (C-2) provides both color emission and stability enhancement. This multi-functionality reduces the need for additional separate layers, thereby limiting complexity increase
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The configuration significantly improves the luminance life of the light emitting device by utilizing specific organic layers and phosphorescent compounds, leading to enhanced performance and longevity.
Implementation Method 1
the above-described phosphorescent compound is a phosphorescent compound represented by the formula (1)
Implementation Method 2
the second organic layer is a layer containing a compound represented by the formula (C-1) and a cross-linked body of a crosslinkable material
Data Source
AI summary
A light emitting device having excellent luminance life contains an anode, a cathode, a first organic layer disposed between the anode and the cathode and a second organic layer disposed between the anode and the cathode. The first organic layer contains a compound represented by the formula (C-1), and the second organic layer contains a compound represented by the formula (C-1) and a cross-linked body of a crosslinkable material.Ring R1C and Ring R2C represent an aromatic hydrocarbon ring or an aromatic hetero ring and RC represents an oxygen atom, a sulfur atom or a group represented by the formula (C′-1).Ring R3C and Ring R4C represent an aromatic hydrocarbon ring or an aromatic hetero ring and RC′ represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom.