Color Conversion Layer with Organic Electroluminescent Material
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Solution Overview
Problem
Large-sized OLED display devices, especially quantum dot organic electroluminescence devices with blue light and quantum dot color filters, suffer from low quantum dot conversion efficiency, necessitating an improvement in light conversion layers.
Innovation Solution
A display panel incorporating an organic electroluminescent device with a color conversion layer containing quantum dots and organic electroluminescent materials, where the organic electroluminescent material forms excitons under blue light excitation, transferring singlet state excitons to quantum dots via fluorescence resonance energy to enhance conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot color filter is used in top emission blue light OLED display devices, then color display capability is improved, but quantum dot conversion efficiency deteriorates
Solution Approach 1:
The patent introduces an organic electroluminescent material as an intermediary between the blue light source and quantum dots. This intermediary material absorbs blue light to generate excitons, which then transfer energy to quantum dots through fluorescence resonance energy transfer (FRET), thereby improving the overall conversion efficiency while maintaining color display capability
Solution Approach 2:
The patent creates a composite color conversion layer containing both organic electroluminescent material and quantum dots. This composite structure enables synergistic interaction where the organic material enhances energy transfer to quantum dots, simultaneously achieving high color display capability and improved conversion efficiency
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 integration of organic electroluminescent materials with quantum dots in the color conversion layer improves light conversion efficiency, addressing the low conversion efficiency issue in conventional OLED display panels.
Implementation Method 1
the organic electroluminescent material forms excitons under the excitation of blue light, and then singlet state excitons are transferred to the quantum dots by fluorescence resonance energy
Data Source
AI summary
A display panel and a display device are provided. The display panel includes an organic electroluminescence device and a color conversion layer disposed on the organic electroluminescence device. The color conversion layer includes a quantum dot material and an organic electroluminescence material. The organic electroluminescent material is added to the color conversion layer. By mixing the organic electroluminescent material and the quantum dot material, the organic electroluminescent material forms excitons under excitation of blue light, and then singlet state excitons are transferred to quantum dots by fluorescence resonance energy, thereby improving an efficiency of the color conversion layer.