Integrated Metal-Layer Encapsulation Film for OLED Heat Management
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Solution Overview
Problem
The commercialization and expanded application of organic light emitting diodes (OLEDs) are hindered by the vulnerability of organic materials and metal electrodes to oxidation from moisture and heat accumulation, leading to deterioration and reduced durability.
Innovation Solution
An encapsulation film with integrated metal layers having high thermal conductivity and controlled linear expansion coefficients, combined with a moisture-resistant encapsulation layer, effectively blocks moisture and oxygen while dissipating heat, maintaining durability under harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional encapsulation methods are used, then moisture barrier protection is provided, but heat dissipation is insufficient leading to temperature increase and device deterioration
Solution Approach 1:
The patent combines the moisture barrier encapsulation layer with metal layers having high thermal conductivity into a single integrated encapsulation film structure. This merging allows the film to simultaneously provide both moisture protection and heat dissipation functions, resolving the contradiction between durability and heat accumulation.
Solution Approach 2:
The encapsulation film is constructed as a composite material system comprising an encapsulation layer (providing moisture barrier) and metal layers (providing thermal conduction). This composite structure enables the film to exhibit both moisture resistance and high thermal conductivity, addressing both protection and heat dissipation requirements.
2Reliability
If multiple separate layers are used for moisture barrier and heat dissipation, then functional performance is improved, but device thickness and complexity increase
Solution Approach 1:
The patent integrates the moisture barrier encapsulation layer and thermal management metal layers into a single encapsulation film, eliminating the need for separate heat dissipation components. This reduces structural complexity while maintaining both moisture protection and heat dissipation functions.
Solution Approach 2:
The encapsulation film is designed as a multi-functional component that simultaneously provides moisture barrier protection, heat dissipation, and thermal stress management. This universal design eliminates the need for multiple separate components, reducing overall device complexity.
3Temperature
If metal layers with high thermal conductivity are used, then heat dissipation is improved, but linear expansion mismatch causes thermal stress and reliability issues
Solution Approach 1:
The patent carefully selects and controls the linear expansion coefficients of the metal layers to match or closely approximate that of the encapsulation layer. By adjusting this critical parameter, the design achieves high thermal conductivity while minimizing thermal expansion mismatch and associated stress.
Solution Approach 2:
The patent applies different metal layers with specifically tailored properties at different locations within the encapsulation film structure. Each metal layer is selected for its specific thermal and mechanical properties to optimize both heat dissipation and stress management in its local context.
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 encapsulation film enhances the reliability and longevity of OLEDs by preventing moisture ingress, releasing heat efficiently, and minimizing thermal stress, thus improving endurance and reducing defects.
Implementation Method 1
at least one layer of the metal layers may have a thermal conductivity of 50 to 800 W/m·K
Implementation Method 2
form a structure capable of blocking moisture or oxygen penetrating into an organic electronic device from the outside
Data Source
AI summary
An encapsulation film, an organic electronic device comprising the same, and a method for manufacturing the organic electronic device using the same, and the encapsulation film which forms a structure capable of blocking moisture or oxygen penetrating from the outside into the organic electronic device, effectively releases the heat accumulated in the organic electronic device, realizes endurance reliability under severe conditions of high temperature and high humidity, and prevents deterioration of the organic electronic device.