Quantum Dot Ink Composition for Uniform Pattern Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current techniques for forming quantum dot-polymer composite patterns in display devices face challenges in achieving high efficiency and uniformity, particularly in preventing nozzle clogging and phase-separation during inkjet printing, which affects the quality and precision of the patterns.
Innovation Solution
An ink composition comprising quantum dots, a carboxyl group-containing binder polymer, an electrical insulating polymer precursor, a radical initiator, and a liquid vehicle with specific organic compounds is developed, allowing for stable discharge and deposition of a uniform quantum dot-polymer composite film without nozzle clogging or phase-separation, using a droplet discharging method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional inkjet printing techniques are used to form quantum dot-polymer composite patterns, then manufacturing process can be simplified, but nozzle clogging and phase-separation occur reducing pattern quality and precision
Solution Approach 1:
The patent modifies the chemical composition parameters of the ink by incorporating specific surfactants and optimizing the ratio of quantum dots to polymer binder. These parameter changes prevent phase-separation and nozzle clogging while maintaining pattern precision, resolving the contradiction between manufacturing simplicity and pattern quality.
Solution Approach 2:
The patent introduces surfactants as intermediary substances that mediate between the quantum dots and polymer binder, preventing phase-separation. The surfactant acts as a compatibility agent that allows the ink to be printed without clogging while maintaining high pattern quality, thus resolving the technical contradiction.
2Productivity
If quantum dot content is increased to improve display performance, then device efficiency improves, but ink viscosity increases causing nozzle clogging
Solution Approach 1:
The patent optimizes the viscosity parameters of the ink by adjusting the solvent composition and adding flow modifiers. This allows high quantum dot content to be maintained for improved display efficiency while the viscosity is controlled to prevent nozzle clogging, resolving the contradiction between productivity and ease of operation.
Solution Approach 2:
The patent uses solvent additives and flow modifiers as intermediary substances that reduce ink viscosity and improve flow characteristics. These intermediaries enable high quantum dot content ink to be discharged smoothly without clogging, resolving the contradiction between display efficiency and dischargeability.
3Stability of the object's composition
If polymer binder content is increased to improve quantum dot dispersion, then uniformity improves, but manufacturing cost increases
Solution Approach 1:
The patent optimizes the concentration parameters of the polymer binder to achieve minimum effective content for uniform quantum dot dispersion. By precisely controlling the binder concentration and using efficient dispersants, the patent reduces material consumption while maintaining dispersion uniformity, resolving the contradiction between composition stability and material loss.
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 enables the formation of high-quality, uniform quantum dot-polymer composite patterns with improved processibility and increased quantum dot content, reducing material consumption and manufacturing costs while maintaining pattern precision and thickness.
Implementation Method 1
a radical initiator; wherein the liquid vehicle includes a mixture of a first organic compound and a second organic compound
Data Source
AI summary
An ink composition includes a quantum dot; a carboxyl group (—COOH)-containing binder polymer; an electrical insulating polymer precursor; a radical initiator; and a liquid vehicle, wherein the liquid vehicle includes a mixture of a first organic compound including a compound represented by Chemical Formula 1, a compound represented by Chemical Formula 2, or a combination thereof, and a second organic compound including a compound represented by Chemical Formula 3, a compound represented by Chemical Formula 4, or a combination thereof: