Transparent Electrode with Embedded Wavelength Conversion
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Solution Overview
Problem
Existing light-emitting components require additional wavelength conversion layers to control the light spectrum, which can be complex and costly, and luminescent materials like quantum dots are sensitive to environmental factors, necessitating additional protection.
Innovation Solution
A light-emitting component with a functional layer stack and electrodes, where a wavelength conversion substance is embedded within a transparent electrode or encapsulation layer, acting as both a protective barrier and a wavelength conversion layer, using thin-film encapsulation techniques like ALD or MLD to ensure protection against environmental influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If separate wavelength conversion layers are added to control light spectrum, then color rendering is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the wavelength conversion function with existing transparent layers (electrode or encapsulation layer) by embedding wavelength conversion substances within them. This merging eliminates the need for separate wavelength conversion layers, thereby simplifying the overall layer structure while maintaining color rendering performance.
Solution Approach 2:
The transparent layers (electrode or encapsulation layer) are given multiple functions: they serve as structural/protective layers while simultaneously acting as wavelength conversion layers through embedded luminescent materials. This multi-functionality reduces the total number of components needed in the light-emitting device.
2Use of energy by moving object
If quantum dots are used for wavelength conversion, then color efficiency is improved, but sensitivity to environmental factors requires additional protection
Solution Approach 1:
The quantum dots (wavelength conversion substances) are nested within the transparent encapsulation layer or electrode material. This nesting provides physical protection to the sensitive quantum dots from environmental factors such as moisture and oxygen, while maintaining their high color efficiency properties.
Solution Approach 2:
The transparent encapsulation layer or electrode material acts as an intermediary barrier between the quantum dots and the external environment. This intermediary layer protects the quantum dots from harmful environmental influences while allowing the wavelength conversion function to operate effectively.
3Reliability
If multiple separate layers are used for encapsulation and wavelength conversion, then protection is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the encapsulation function and wavelength conversion function into a single integrated layer. By embedding wavelength conversion substances within the transparent encapsulation layer or electrode, the manufacturing process requires fewer separate deposition steps and simplifies production while maintaining protective functionality.
4Illumination intensity
If additional wavelength conversion layers are added, then spectrum control is improved, but production cost increases
Solution Approach 1:
Existing transparent layers are designed to serve dual purposes: maintaining their primary structural/protective function while simultaneously providing wavelength conversion capability through embedded luminescent materials. This reduces the total quantity of material layers needed while achieving effective spectrum control.
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
This approach eliminates the need for separate wavelength conversion layers, simplifies production, and effectively protects sensitive materials like quantum dots, enhancing color rendering and efficiency while reducing process complexity and costs.
Implementation Method 1
a wavelength conversion substance, which is embedded in the transparent layer containing the wavelength conversion substance
Implementation Method 2
By a recombination of holes and electrons, light can be generated in the light-emitting layer by electro-luminescence during the operation of the component
Data Source
AI summary
A light-emitting component is provided including a functional layer stack having at least one light-emitting layer which is set up to generate light during the operation of the component, a first electrode and a second electrode, which are set up to inject charge carriers into the functional layer stack during operation, and an encapsulation arrangement having encapsulation material, which is arranged above at least one of the electrodes and the functional layer stack. At least one of the electrodes is transparent and contains a wavelength conversion substance and/or the encapsulation material is transparent and contains a wavelength conversion substance.