Organic Light-Emitting Device UV Absorber Encapsulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light-emitting devices are susceptible to damage from external ultraviolet light, which can degrade the emission layer containing organic materials, especially when used in outdoor applications or during manufacturing processes that involve UV irradiation.
Innovation Solution
An electronic apparatus with a thin film encapsulation portion comprising a cured product of a composition that includes a curable material and an ultraviolet (UV) absorber, such as acryl-based or methacryl-based materials, to reduce the amount of UV light transmitted to the organic light-emitting device, thereby protecting it from UV-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the organic light-emitting device is used in outdoor applications or during manufacturing processes that involve UV irradiation, then the device can function in various environments, but the emission layer containing organic materials is damaged by ultraviolet light
Solution Approach 1:
The patent introduces an intermediary substance (UV absorber or UV shielding material) between the harmful UV light and the organic light-emitting device. This intermediary layer absorbs or blocks UV radiation while allowing the device to function in outdoor environments, thus resolving the contradiction between adaptability and UV damage resistance
Solution Approach 2:
The patent converts the harmful UV radiation into a beneficial effect by using UV-absorbing materials that transform UV energy into harmless forms (such as heat or stable chemical bonds). The UV light that would normally damage the organic materials is instead absorbed and dissipated safely, allowing outdoor application while protecting the emission layer
2Object-affected harmful factors
If a thin film encapsulation portion with UV absorber is added to protect the device, then UV light damage is reduced, but the device structure becomes more complex
Solution Approach 1:
The patent employs thin film encapsulation layers that provide UV protection without adding significant structural complexity. These thin films are integrated into the existing device architecture, offering a streamlined solution that protects against UV damage while maintaining device simplicity
Solution Approach 2:
The encapsulation portion serves multiple functions simultaneously: it provides UV protection, acts as a protective barrier, and maintains device structure. This multi-functionality reduces the need for separate protective components, thereby limiting the increase in device complexity while effectively reducing UV light transmission
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 solution effectively prevents UV light from penetrating and damaging the organic light-emitting device, ensuring its stability and longevity, especially in outdoor use and during manufacturing, while maintaining high light emission efficiency.
Implementation Method 1
the composition comprising a curable material and an ultraviolet (UV) absorber
Implementation Method 2
the organic film comprises a cured product of a composition for forming an organic film
Data Source
AI summary
An electronic apparatus comprising:a substrate; an organic light-emitting device disposed on the substrate; anda thin film encapsulation portion sealing the organic light-emitting device and comprising at least one organic film, wherein the organic film comprises a cured product of a composition for forming an organic film, the composition comprising a curable material and an ultraviolet (UV) absorber,wherein the curable material comprises at least one selected from an acryl-based material, a methacryl-based material, an acrylate-based material, a methacrylate-based material, a vinyl-based material, an epoxy-based material, a urethane-based material, and a cellulose-based material, andthe organic light-emitting device that includes a first electrode, a second electrode facing the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport region between the first electrode and the emission layer is presented. The emission layer includes a first compound represented by Formula 1, and the hole transport region includes a diamine compound: