Quantum Dot Light-Emitting Device Patterning via UV Cross-Linking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for patterning quantum dot light-emitting devices using sacrifice layers often result in uneven etching and residue, leading to incomplete deposition and uneven light emission due to strong interactions between the sacrifice layer and the electron transport layer, causing partial peeling of the quantum dot layer during wet etching.
Innovation Solution
A quantum dot light-emitting device structure that includes a substrate, a first electrode, a carrier film layer, a fixed layer with a connecting structure formed by cross-linking the carrier film layer and sacrifice layer materials under ultraviolet light, and a quantum dot layer, where the fixed layer is tightly bonded to the carrier film layer, preventing peeling during wet etching and ensuring complete patterning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sacrifice layer is used for patterning the quantum dot layer, then the quantum dot layer can be patterned, but the sacrifice layer strongly interacts with the electron transport layer causing uneven etching and residue
Solution Approach 1:
The patent introduces a carrier film layer as an intermediary between the electron transport layer and the sacrifice layer. This carrier film layer prevents the strong interaction between the sacrifice layer and electron transport layer, thereby eliminating uneven etching and residue while maintaining patterning precision.
Solution Approach 2:
The patent segments the original interface between the electron transport layer and sacrifice layer by inserting a carrier film layer. This segmentation isolates the two layers that previously had strong interactions, allowing the sacrifice layer to be removed cleanly without affecting the electron transport layer.
2Loss of substance
If wet etching is used to remove the sacrifice layer, then the sacrifice layer can be removed, but the quantum dot layer peels off due to strong interactions
Solution Approach 1:
The carrier film layer acts as a mediator that protects the quantum dot layer during wet etching. It allows the sacrifice layer to be removed while preventing the quantum dot layer from peeling off, thus maintaining adhesion strength.
Solution Approach 2:
The carrier film layer provides beforehand cushioning protection to the quantum dot layer before the wet etching process. This protective layer prevents damage and peeling during the removal of the sacrifice layer.
3Loss of substance
If the sacrifice layer is removed by solvent stripping, then the sacrifice layer can be eliminated, but residue remains due to strong interactions
Solution Approach 1:
The carrier film layer serves as an intermediary that prevents the sacrifice layer from strongly interacting with the electron transport layer. This allows complete removal of the sacrifice layer by solvent stripping without leaving residue on the electron transport layer.
Solution Approach 2:
The carrier film layer enables complete discarding of the sacrifice layer through solvent stripping without any recovery needed, as it prevents residue formation on the underlying 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
The solution ensures complete patterning of the quantum dot layer without peeling, maintaining the entirety of the film layer and achieving even light emission by preventing the fixed layer from being dissolved during solvent stripping.
Implementation Method 1
the connecting structure is formed by subjecting a first radical of the carrier film layer and a photosensitive radical connected with the fixed layer to a cross-link reaction under irradiation of ultraviolet light
Data Source
AI summary
Disclosed are a quantum dot light-emitting device and a manufacturing method thereof, including: a substrate; a first electrode, disposed on the substrate; a carrier film layer, disposed on a side of the first electrode facing away from the substrate; a fixed layer, disposed on a side of the carrier film layer facing away from the substrate, a connecting structure being arranged between the fixed layer and the carrier film layer; a quantum dot layer, disposed on a side of the fixed layer facing away from the substrate; and a second electrode, disposed on a side of the quantum dot layer facing away from the substrate.