OLED Package Water-Oxygen Absorbing Layer
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Solution Overview
Problem
OLED display panels face a significant reduction in service life due to water vapor and oxygen entering the device, which react with the light-emitting layer, leading to degradation.
Innovation Solution
A display panel with a package structure that includes a first water-oxygen absorbing layer comprising transition metal nanoparticles and a metal organic framework, which absorbs moisture and oxygen, and optionally a second water-oxygen absorbing layer on the opposite side of the OLED device, extending the panel's service life by preventing ingress of water vapor and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging is used for OLED devices, then the device structure is simple and manufacturing is easy, but water vapor and oxygen can enter the device causing light-emitting layer degradation and reduced service life
Solution Approach 1:
The patent uses composite materials consisting of transition metal nanoparticles embedded in a metal organic framework to create the water-oxygen absorbing layer. This composite structure combines the high reactivity of transition metal nanoparticles with the porous protective structure of MOF, achieving superior water and oxygen absorption performance while maintaining a manageable package structure
Solution Approach 2:
The metal organic framework provides a porous structure with high surface area and controlled pore sizes that facilitate the absorption of water vapor and oxygen molecules. The porous nature of MOF allows efficient diffusion of water and oxygen to the active transition metal nanoparticle sites while maintaining structural integrity
2Reliability
If water-oxygen absorbing layers are added to block moisture and oxygen, then service life is extended, but the package structure becomes more complex and manufacturing becomes more difficult
Solution Approach 1:
The water-oxygen absorbing layer is prepared and integrated into the package structure during the manufacturing process before the OLED device is sealed. This preliminary action ensures that the protective layer is already in place to prevent water and oxygen ingress from the beginning, avoiding the need for post-assembly modifications
Solution Approach 2:
The metal organic framework acts as an intermediary structure that supports and distributes the transition metal nanoparticles throughout the absorbing layer. This intermediary framework provides a stable matrix that facilitates uniform material distribution and simplifies the coating and deposition processes during manufacturing
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 water-oxygen absorbing layers effectively block moisture and oxygen, thereby extending the service life of the OLED device by forming a protective barrier around the light-emitting layer.
Implementation Method 1
a first water-oxygen absorbing layer comprising a first water oxygen absorbing material. The first water-oxygen absorbing material comprises first transition metal nanoparticles and a first metal organic framework coated on a surface of the first transition metal nanoparticles
Implementation Method 2
After entering the OLED device, water and oxygen may react with material of a light-emitting layer, thereby resulting in denaturation of the light-emitting layer
Data Source
AI summary
The present disclosure relates to a display panel. The display panel may include an OILED device and a package structure on the OLED device. The package structure may include a first water-oxygen absorbing layer comprising a first water-oxygen absorbing material. The first water-oxygen absorbing material may include first transition metal nanoparticles and a first metal organic framework coated on a surface of the first transition metal nanoparticles.