Solvent-Free Quantum Dot Composition for Stable Ink-Jetting
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Solution Overview
Problem
Existing quantum dot compositions face challenges with viscosity issues due to solvent limitations, leading to nozzle clogging and reduced photoefficiency, making it difficult to apply them in actual processes.
Innovation Solution
A solvent-free curable composition is developed, incorporating a curable monomer with a linking group and quantum dots, which maintains low viscosity and improves ink-jetting properties, ensuring excellent storage stability and processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If quantum dots are dispersed in a solvent with high hydrophobicity to achieve good dispersion, then the quantum dots can be stably dispersed, but the viscosity increases excessively and processability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the curable monomer by introducing a linking group with specific substituents (R1-R10 groups) to modify the monomer's polarity and viscosity characteristics, enabling better quantum dot dispersion without excessive viscosity increase
Solution Approach 2:
The patent creates a composite curable monomer system combining the linking group structure with quantum dots, where the composite material exhibits both good dispersion properties and acceptable viscosity for ink-jetting processes
2Reliability
If the quantum dot content is increased to improve photoefficiency, then photoefficiency increases, but the viscosity exceeds the ink-jetting range and processability is lost
Solution Approach 1:
The patent modifies the curable monomer's molecular structure parameters (introducing linking groups with specific R1-R10 substituents) to change the composition's rheological properties, allowing higher quantum dot loading while maintaining ink-jetting suitable viscosity
3Ease of operation
If a solvent is used to reduce viscosity for ink-jetting, then viscosity is improved, but nozzle drying and nozzle clogging occur during the process
Solution Approach 1:
The patent extracts and eliminates the solvent component from the composition entirely, using a solvent-free curable monomer system that achieves appropriate viscosity through the monomer's molecular structure itself rather than through dissolved solvent
Solution Approach 2:
The patent changes the fundamental composition parameters from a solvent-based system to a solvent-free system, where the curable monomer's intrinsic properties (modified by the linking group structure) provide the necessary viscosity characteristics without the harmful effects of solvent volatilization
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 solvent-free composition achieves stable ink ejection and maintains quantum dot efficiency, minimizing nozzle clogging and thickness deviations, enabling effective application in display devices.
Implementation Method 1
a curable monomer having a linking group and used for producing a cured film
Data Source
AI summary
Disclosed are a solvent-free curable composition including quantum dots; and a curable monomer represented by Chemical Formula 1, a cured layer manufactured using the composition, a color filter including the cured layer, and a display device including the color filter.In Chemical Formula 1, each substituent is as defined in the specification.