Alkoxy Chain Surface Modification for OLED Sealing
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Solution Overview
Problem
Conventional display panels face challenges due to poor flowability of organic material on inorganic material layers, affecting the flatness and sealing of organic light-emitting materials, which compromises the longevity of the display panels.
Innovation Solution
A method is introduced that modifies the surface of the inorganic material layer by reacting hydroxyl functional groups with trimethyl aluminum gas and hydroxyl functional group containing alkyl alcohol gas to form aluminum containing hydrocarbon functional groups, which are then converted into alkoxy chains, enhancing the flowability of the organic buffer layer and improving the sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic material layer and an organic material layer are combined to increase sealing, then sealing performance is improved, but flowability of the organic material on the inorganic material layer deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the inorganic material layer surface by introducing hydroxyl functional groups through plasma treatment or chemical modification. This alters the surface energy and wettability parameters, enabling the organic material to spread properly while maintaining the inorganic-organic layered sealing structure
Solution Approach 2:
The patent introduces an intermediate organic buffer layer between the inorganic material layer and the organic light-emitting material. This intermediary layer has compatible properties with both layers, allowing it to wet the inorganic layer effectively while providing a suitable substrate for the organic light-emitting material, thus resolving the flowability issue
2Reliability
If organic material is formed on an inorganic material layer, then sealing is enhanced, but flatness of the organic material layer deteriorates due to poor flowability
Solution Approach 1:
By modifying the surface energy parameters of the inorganic material layer through hydroxyl functional group introduction, the patent enables proper wetting and spreading of the organic buffer layer, which in turn achieves flatness of the overlying organic light-emitting material layer while maintaining sealing
Solution Approach 2:
The organic buffer layer acts as an intermediary that fills in surface irregularities of the inorganic material layer. Through proper formulation and controlled deposition, this intermediate layer planarizes the surface, providing a flat substrate for the organic light-emitting material while the inorganic-organic combination maintains sealing performance
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 modified surface treatment reduces the contact angle of the organic buffer layer with the inorganic layer to less than 5 degrees, increasing the flowability and planarization of the organic buffer layer, thereby enhancing the sealing and longevity of the display panel.
Implementation Method 1
a step e1 of injecting a trimethyl aluminum gas towards the surface of the first inorganic material to have hydroxyl functional groups on the surface of the first inorganic material react with the trimethyl aluminum gas, so as to form aluminum containing hydrocarbon functional groups on the surface of the first inorganic material
Implementation Method 2
a step e2 of injecting a hydroxyl functional group containing alkyl alcohol gas towards the surface of the first inorganic material to transfer hydroxyl functional groups of the aluminum containing hydrocarbon functional groups on the surface of the first inorganic material into alkoxy chains
Implementation Method 3
the first inorganic layer is configured to prevent water outside of the display panel from contacting the OLED device layer
Data Source
AI summary
The present disclosure provides a display panel and a method for manufacturing the same. The method includes forming a base layer, a thin film transistor (TFT) device layer, an organic light-emitting diode (OLED) device layer, and a first inorganic material in turn on a substrate; modifying a surface of the first inorganic material to increase flowability of an organic buffer layer that is to be formed on a surface of the first inorganic layer; and forming the organic buffer layer and a second inorganic layer in turn on the first inorganic layer. According to the present disclosure, flowability of the organic material formed on the inorganic material layer is increased.