Photosensitive Initiator for Direct Quantum Dot Layer Patterning
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Solution Overview
Problem
The traditional method of patterning quantum dot light-emitting layers using photoresist is complex and has poor solvent compatibility, limiting its further application in high-resolution quantum dot light-emitting diode displays.
Innovation Solution
A new initiator is developed with a molecular structure that includes sulfur, oxygen, and nitrogen-hydrogen groups to enhance the initiation rate of polymerization, allowing direct patterning of quantum dot light-emitting layers without photoresist, using a photosensitive reaction between the initiator and quantum dot ligands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the traditional photoresist method is used for patterning quantum dot light-emitting layers, then the patterning process can be performed, but the process complexity increases and solvent compatibility deteriorates
Solution Approach 1:
The patent extracts and removes the photoresist component from the patterning process. By directly using the quantum dot light-emitting layer material itself as the photosensitive material, the complex multi-step photoresist process is eliminated, achieving simplification while maintaining patterning capability
Solution Approach 2:
The patent makes the quantum dot light-emitting layer material serve multiple functions: it acts as both the light-emitting material and the photosensitive material for patterning. This multi-functionality eliminates the need for separate photoresist layers and processes, reducing overall process complexity
2Manufacturing precision
If the traditional photoresist method is used for patterning quantum dot light-emitting layers, then the patterning process can be performed, but the solvent compatibility worsens
Solution Approach 1:
The patent merges the photosensitive functionality into the quantum dot light-emitting layer material itself. By incorporating photosensitive groups directly into the quantum dot ligand structure, the material can undergo photosensitive reactions without requiring external photoresist, thereby improving solvent compatibility across different processing conditions
3Device complexity
If a photosensitive reaction is used for direct patterning without photoresist, then the process complexity reduces, but the initiation rate of polymerization must be sufficiently high to ensure patterning quality
Solution Approach 1:
The patent modifies the chemical structure of the quantum dot ligand by introducing specific photosensitive groups (such as vinyl groups, epoxide groups, or isocyanate groups). These structural changes enable the ligand to undergo efficient photosensitive polymerization reactions with high initiation rates, ensuring patterning quality while using the simplified direct patterning process
4Ease of manufacture
If the quantum dot light-emitting layer is directly patterned without photoresist, then the production costs reduce, but the manufacturing precision must be maintained at high levels
Solution Approach 1:
The patent creates a composite structure where the quantum dot core is combined with specially designed ligands containing photosensitive groups. This composite material design enables the quantum dot assembly to undergo controlled photosensitive crosslinking or polymerization reactions, achieving high-resolution patterning directly without photoresist, thereby reducing production costs while maintaining manufacturing precision
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 new initiator significantly improves the initiation rate and stability of free radicals, enabling the formation of high-quality patterned quantum dot light-emitting layers with higher resolution and reduced production costs.
Implementation Method 1
The ligand is configured to undergo a photosensitive reaction under light radiation with the initiator
Data Source
AI summary
An initiator, a quantum dot, a quantum dot light-emitting layer and a manufacturing method thereof, a light-emitting device, a display device. The structural formula of the initiator isR11˜R15 are any one of H, a group including N and H, ester, alkyl; R21˜R24 are any one of H, F, S, O, ester, alkyl, a group including N and H; R3 is any one of S, O, ester, amide, alkyl, H, F; R4 is any one of ester, alkyl, a group including N and H; R31˜R39 are present or absent, when at least one of R31˜R39 is present, it is any one of ester, alkyl, a group including N and H; n≥1 and is a positive integer, a group of the initiator includes at least one of S, O, the group including N and H, the group of the initiator refers to a group except a benzophenone matrix.