Organic Light-Emitting Device with Fluorescent Encapsulation
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Solution Overview
Problem
The production of white light in organic electroluminescent devices is complex and costly due to the difficulty in controlling the mixing ratio of luminescent materials required to achieve white light emission.
Innovation Solution
An organic light-emitting device with an encapsulation structure containing fluorescent materials that are excited by the light emitted by the organic light-emitting element, generating additional light to produce white light, simplifying the structure to a single light-emitting layer and reducing the need for multiple luminescent materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple luminescent materials are mixed to achieve white light emission, then white light can be produced, but the production process becomes complex and production cost increases
Solution Approach 1:
The patent uses a fluorescent material as an intermediary substance that converts monochromatic light from the organic light-emitting element into broad-spectrum white light. This fluorescent material acts as a mediator between the simple monochromatic light source and the desired white light output, eliminating the need for complex multi-material mixing while achieving the target illumination.
Solution Approach 2:
The patent changes the optical parameters by using a fluorescent material with specific emission characteristics that, when excited by monochromatic light, produces white light. By adjusting the fluorescence emission spectrum and intensity, the system achieves white light output without complex material combinations, simplifying the production process.
2Illumination intensity
If multiple luminescent materials are mixed to achieve white light emission, then white light can be produced, but production cost increases
Solution Approach 1:
The fluorescent material serves as a cost-effective intermediary that transforms simple monochromatic light into white light. This approach reduces production costs by eliminating the need to purchase and precisely mix multiple expensive luminescent materials, while still achieving the desired white light emission for display applications.
Solution Approach 2:
The patent employs a fluorescent material that can be easily applied and integrated into the display structure, replacing the need for complex, expensive multi-material systems. The fluorescent layer can be manufactured using simpler, more cost-effective processes, reducing overall production costs while maintaining white light emission capability.
3Illumination intensity
If multiple luminescent materials are mixed to achieve white light emission, then white light can be produced, but controlling the mixing ratio becomes difficult
Solution Approach 1:
The fluorescent material acts as a mediator that eliminates the need for precise mixing ratios of multiple luminescent materials. By using a single fluorescent material excited by monochromatic light, the system achieves white light emission without the manufacturing precision challenges associated with controlling the mixing ratios of multiple materials, simplifying quality control and production consistency.
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
This approach simplifies the device structure, reduces production costs, and allows for easy control of chromaticity by adjusting the concentration and thickness of the fluorescent material, achieving white light emission efficiently.
Implementation Method 1
The encapsulation structure comprises a fluorescent material, and the organic light-emitting element emits a first light, and the fluorescent material is excited by the first light to generate a second light
Data Source
AI summary
An organic light-emitting device and preparation method thereof, and a display apparatus are provided. The organic light-emitting device includes: a base substrate, an organic light-emitting element provided on the base substrate and an encapsulation structure for encapsulating the organic light-emitting element. The encapsulation structure includes a fluorescent material, and the organic light-emitting element emits a first light, and the fluorescent material is excited by the first light to generate a second light.