Surfactant Embedded Polyacid Composite for OLED Electron Injection
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Solution Overview
Problem
Conventional OLED devices have inefficient electron injection capabilities and high fabrication costs, resulting in low luminous efficiency.
Innovation Solution
Incorporating a surfactant embedded polyacid composite, specifically tetra-octylammonium embedded silicotungstic acid, as the electron injection layer, which is formed using a wet film-forming method, enabling effective electron injection and simplifying the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal oxide or polymer materials are used as electron injection layer, then the device structure is simple, but the electron injection capability is insufficient and luminous efficiency is low
Solution Approach 1:
The patent uses a composite material consisting of polyacid and surfactant molecules embedded together to form the electron injection layer. This composite structure combines the advantages of both components: polyacid provides good film-forming quality and stability, while surfactant molecules enhance electron injection capability. The composite material achieves both reliable electron injection and high luminous efficiency, resolving the contradiction between electron injection capability and luminous efficiency.
2Ease of manufacture
If conventional electron injection layer materials are used, then the fabrication process is relatively simple, but the fabrication cost is high
Solution Approach 1:
The patent changes the material parameters by selecting polyacid and surfactant components that can be processed using wet film-forming methods at lower costs. The surfactant molecules provide cost-effective electron injection functionality while maintaining good film quality. This parameter change in material selection enables both simple fabrication process and reduced fabrication cost.
3Reliability
If conventional electron injection layer materials are used, then the device can be fabricated, but the luminous efficiency is much room for improvement
Solution Approach 1:
The surfactant molecules act as intermediaries between the polyacid matrix and the electrode, facilitating efficient electron injection. The surfactant's amphiphilic nature allows it to interface effectively with both the polar polyacid and the electrode surface, creating an optimal electron transport pathway. This intermediary role of surfactant significantly improves luminous efficiency while maintaining device functionality.
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 surfactant embedded polyacid composite enhances electron injection efficiency, increases luminous efficiency, and provides a cost-effective, environmentally friendly, and stable OLED device with good film quality.
Implementation Method 1
the electron injection layer is a surfactant embedded polyacid composite... can make the electron injection of the device more effective
Implementation Method 2
depositing a hole injection layer material, a hole transport layer material, a light emitting layer material, an electron transport layer material sequentially on the anode by a vacuum evaporation deposition method
Implementation Method 3
depositing a layer of anode material on the substrate by a method of magnetron sputtering to form an anode
Implementation Method 4
depositing a surfactant embedded polyacid composite solution on the electron transport layer by a material spin-on method to form an electron injection layer
Data Source
AI summary
The present application discloses an OLED device and a method for fabricating thereof. The device includes an electron injection layer, the electron injection layer is a surfactant embedded polyacid composite. By the above method, the present invention can make the internal electron injection into the device more effective, the device has higher luminous efficiency, and the fabricating process is simple, the stability is high, and the film quality is good.