Display Encapsulation with Raman-Controlled 2D Layers
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Solution Overview
Problem
Existing display devices face challenges in effectively utilizing two-dimensional materials, particularly in controlling the number of layers and optimizing the manufacturing process to reduce costs.
Innovation Solution
A display device manufacturing method that involves exfoliating a multi-layer structure of two-dimensional materials using a thermal release tape, with specific control over the slope of Raman spectroscopy peaks to achieve precise layer control, and incorporating graphene in the encapsulation layer to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-layer two-dimensional material is used in display device, then performance and durability are improved, but manufacturing complexity and cost increase
Solution Approach 1:
The encapsulation layer is divided into multiple sequential layers (first encapsulation layer, second encapsulation layer, third encapsulation layer) with different materials and functions. The two-dimensional material is segmented into specific layer counts (1-10 layers) with controlled distribution, where the first and third layers provide barrier functions and the second layer provides planarization function.
Solution Approach 2:
The patent controls the number of two-dimensional material layers as a critical parameter (1-10 layers) and uses Raman spectroscopy to measure and control the 2D-peak to G-peak intensity ratio as a quality parameter. This parameter-based control enables precise manufacturing while maintaining performance.
2Manufacturing precision
If precise control of two-dimensional material layer number is implemented, then manufacturing precision is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent uses Raman spectroscopy to detect characteristic peaks (2D-peak and G-peak) of two-dimensional materials. The intensity ratio between these peaks serves as a fingerprint to determine layer number and quality, enabling non-destructive, rapid measurement and precise control of material layers.
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 method allows for precise control of the number of layers and reduces manufacturing costs while improving the performance and durability of display devices.
Implementation Method 1
exfoliating at least one layer of the multi-layer structure of the two-dimensional material member utilizing the thermal release tape
Implementation Method 2
exfoliating at least one layer of the multi-layer structure of the two-dimensional material member utilizing the thermal release tape
Implementation Method 3
A slope of a 2D-peak position to a G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1.7 to 2.7
Data Source
AI summary
The display device comprises a substrate, a first electrode on the substrate, a pixel defining layer on the first electrode, the pixel defining layer exposing the first electrode, a light emitting layer on the first electrode exposed by the pixel defining layer, a second electrode on the light emitting layer, and an encapsulation layer on the second electrode, the encapsulation layer including a two-dimensional material. A slope of a 2D-peak position to a G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1.7 to 2.7.