Quantum Dots Material Solubility Control for Display Patterning
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Solution Overview
Problem
In display technology, quantum dots materials in inter-block regions of a quantum dots layer can cause color cross-talk and mixing due to their high solubility in developing solutions, leading to suboptimal display quality.
Innovation Solution
A method involving a quantum dots material solution with a photoacid generator and a quencher, such as hydrogen ions, is used to convert quantum dots in block regions from a first form to a second form with lower solubility, allowing for selective removal of residual quantum dots in inter-block regions, thereby reducing color cross-talk by quenching the quantum dots material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum dots material is used in inter-block regions, then the quantum dots layer can be formed, but color cross-talk and mixing occur due to high solubility in developing solutions
Solution Approach 1:
The patent applies local quality by making the quantum dots material have different solubility properties in different regions. The quantum dots material is designed to be insoluble in the developing solution at block regions (where quantum dots blocks should form) while remaining soluble at inter-block regions (where quantum dots should be removed). This spatial variation in solubility enables precise patterning and eliminates color cross-talk by ensuring quantum dots material only remains where desired.
2Ease of manufacture
If quantum dots material has high solubility in developing solution, then the material can be processed, but residual quantum dots remain in inter-block regions causing color mixing
Solution Approach 1:
The patent implements local quality by creating region-specific solubility characteristics. The quantum dots material is formulated to be soluble in the developing solution at inter-block regions, enabling complete removal of residual material, while being insoluble at block regions where quantum dots blocks are intended to form. This localized solubility control ensures both ease of processing and high color accuracy by preventing any residual quantum dots from causing color mixing.
3Object-affected harmful factors
If quantum dots material is completely removed from inter-block regions, then color cross-talk is reduced, but the quantum dots layer formation becomes more difficult
Solution Approach 1:
The patent applies parameter changes by modifying the solubility parameter of the quantum dots material in response to the developing solution. The quantum dots material is designed with specific solubility characteristics that change based on its location: high solubility at inter-block regions for complete removal and low solubility at block regions for stable block formation. This parameter optimization enables effective elimination of color cross-talk while maintaining a relatively simple single-step development process.
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 method significantly improves display quality by ensuring that only quantum dots in block regions remain, while those in inter-block regions are quenched, resulting in enhanced color accuracy and reduced emission intensity ratios of over 95:1.
Implementation Method 1
a first material capable of generating, upon a first irradiation, a quencher quenching the quantum dots material
Implementation Method 2
a quencher quenching the quantum dots material... allowing for selective removal of residual quantum dots in inter-block regions, thereby reducing color cross-talk by quenching the quantum dots material
Data Source
AI summary
A quantum dots material solution is provided. The quantum dots material solution includes a quantum dots material; a ligand chelated to the quantum dots material; a fast material capable of generating, upon a first irradiation, a quencher quenching the quantum dots material; a second material capable of at least partially converting the quantum dots material in a plurality of block regions from a first form into a second form. The quantum dots material in the second form has a lower solubility in a developing solution than the quantum dots material in the first form.