OLED Anti-Peeling Layer Prevents Electrode Delamination
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Solution Overview
Problem
Organic Light-Emitting Diodes (OLEDs) in display devices are vulnerable to external gases like oxygen and moisture, leading to potential damage or peeling of the protective layer and second electrode, which degrades the product quality, depending on the material and manufacturing process used.
Innovation Solution
An organic light-emitting display device structure incorporating a substrate, a first electrode, an organic layer, a second electrode, an anti-peeling layer made of inorganic material, and a protective layer made of metal oxide, with the anti-peeling layer preventing peeling and protecting the OLED from damage during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is disposed to protect the OLED from external gases, then the OLED is protected from oxygen and moisture penetration, but the protective layer or second electrode may peel off depending on the material and manufacturing process
Solution Approach 1:
An anti-peeling layer is introduced as an intermediary between the protective layer and the second electrode. This intermediate layer acts as a buffer that prevents direct harmful interactions between the protective layer material and the second electrode, thereby preventing peeling while maintaining protection functionality.
Solution Approach 2:
The device uses a composite structure consisting of multiple layers with different materials: the protective layer, the anti-peeling layer with specific material properties, and the second electrode. This composite approach allows each layer to perform its specific function while working together to prevent peeling and provide comprehensive protection.
2Ease of manufacture
If different materials and manufacturing processes are used for the protective layer, then manufacturing flexibility is improved, but the quality of the product is affected or decreased
Solution Approach 1:
The anti-peeling layer is designed with specific material parameters (composition, thickness, physical properties) that remain consistent regardless of the protective layer material or manufacturing process used. By controlling the parameters of the anti-peeling layer, product quality is maintained while allowing flexibility in protective layer material selection and manufacturing processes.
3Reliability
If the protective layer material is optimized for protection, then OLED protection is improved, but peeling of the protective layer or second electrode occurs
Solution Approach 1:
The anti-peeling layer serves as a mediator that decouples the relationship between protective layer optimization and adhesion. The protective layer can be optimized for protection effectiveness without compromising adhesion, as the anti-peeling layer absorbs the stress and prevents peeling at the interface.
Data Source
AI summary
The present disclosure provides an organic light-emitting display device including: a substrate; a first electrode configured to be disposed on the substrate; an organic layer configured to be disposed on the first electrode; a second electrode configured to be disposed on the organic layer; an anti-peeling layer configured to be disposed on the second electrode and to include an inorganic material; and a protective layer configured to be disposed on the anti-peeling layer and to include a metal oxide, and a method for manufacturing the organic light-emitting display device.