Self-Healing OLED Barrier for Crack Resistance
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Summary
Problems
Organic light emitting diode (OLED) display devices face deterioration due to oxygen and moisture permeation, which can lead to electrode breakage, especially in flexible panels with cracked barrier layers, resulting in reduced emission properties.
Innovation solutions
Incorporating a chemically self-healing material in the organic layer of the barrier and filler layers, which initiates a chemical reaction upon crack formation to fill and prevent the extension of cracks, using a combination of polymerizable monomers and polymerization initiators, such as acrylic and epoxy resins with radical or positive ion initiators, to prevent oxygen and moisture permeation.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a barrier layer with lamination structure is used to prevent oxygen and moisture permeation, then the emission property is maintained, but cracks in the barrier layer cause electrode breakage and emission deterioration
Why choose this principle:
The organic layer is designed to automatically heal cracks through self-alignment and flow of organic material when cracks occur in the barrier layer, without requiring external intervention. This self-healing mechanism maintains the protective function of the barrier layer and prevents electrode breakage, resolving the contradiction between maintaining emission property and resisting cracks.
Principle concept:
If a barrier layer with lamination structure is used to prevent oxygen and moisture permeation, then the emission property is maintained, but cracks in the barrier layer cause electrode breakage and emission deterioration
Why choose this principle:
The organic layer is positioned and configured in advance to serve as a cushioning layer that can deform and flow to fill cracks in the barrier layer before they propagate to the electrode. This pre-positioned protective mechanism prevents harmful effects before they occur, maintaining both crack resistance and emission property.
Application Domain
Data Source
AI summary:
Incorporating a chemically self-healing material in the organic layer of the barrier and filler layers, which initiates a chemical reaction upon crack formation to fill and prevent the extension of cracks, using a combination of polymerizable monomers and polymerization initiators, such as acrylic and epoxy resins with radical or positive ion initiators, to prevent oxygen and moisture permeation.
Abstract
A display device includes: a substrate; a thin film transistor on the substrate; a first electrode, a light emitting diode and a second electrode sequentially on the thin film transistor; a barrier layer on the second electrode, the barrier layer including at least one organic layer; and a front film on the barrier layer, wherein the at least one organic layer includes a chemically self-healing material.