Quantum Dot Ink Composition for Stable High-Solid Pattern Printing
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Solution Overview
Problem
Existing methods for forming luminescent nanostructure films or patterns face challenges such as complex processes, high material consumption, and issues with dispersibility and agglomeration of nanostructures during inkjet printing, leading to inefficient pattern formation and equipment adhesion.
Innovation Solution
An ink composition comprising titanium oxide particles, luminescent nanostructures, and a monomer with a carbon-carbon unsaturated bond, optimized for high solid content and improved dispersibility, allowing for stable inkjet printing without agglomeration and equipment adhesion, forming luminescent nanostructure composites with enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inkjet printing methods are used to form luminescent nanostructure films, then the process is simple, but the nanostructures exhibit poor dispersibility and agglomeration, leading to inefficient pattern formation and equipment adhesion
Solution Approach 1:
The patent introduces an organometallic complex as an intermediary substance that mediates between the luminescent nanostructures and the inkjet printing process. This complex acts as a dispersing agent and stabilizer, preventing agglomeration of nanostructures while enabling stable inkjet deposition. The organometallic complex serves as a bridge that resolves the contradiction between maintaining simple printing processes and achieving reliable nanostructure dispersibility.
2Loss of substance
If high solid content ink composition is used, then material consumption is reduced, but the ink composition becomes more viscous and difficult to print
Solution Approach 1:
The patent employs parameter changes by carefully controlling the solid content of the ink composition within an optimized range and adjusting related parameters such as solvent composition, organometallic complex concentration, and particle size distribution. These parameter adjustments maintain high solid content to reduce material consumption while preserving adequate fluidity for inkjet printing operation.
3Manufacturing precision
If luminescent nanostructures are directly printed, then the process is straightforward, but the patterns show poor uniformity and the nanostructures adhere to equipment surfaces
Solution Approach 1:
The patent applies preliminary action by pre-coating the luminescent nanostructures with an organometallic complex before the inkjet printing process. This preliminary treatment modifies the surface properties of the nanostructures, preventing adhesion to equipment surfaces during printing and ensuring uniform distribution in the final pattern. The pre-treatment step resolves the contradiction between straightforward printing and pattern uniformity by preparing the nanostructures in advance.
4Reliability
If complex multi-step processes are used to form luminescent films, then film quality is improved, but the production time and process complexity increase
Solution Approach 1:
The patent merges multiple functions into a single ink composition formulation that combines luminescent nanostructures, organometallic complex, solvent, and other additives into one homogeneous mixture. This merged formulation enables simultaneous achievement of good dispersibility, stable printing, and high-quality film formation in a single inkjet printing process, eliminating the need for separate preparation steps and improving production efficiency while maintaining film quality.
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 ink composition enables efficient, stable, and patterned luminescent nanostructure films through inkjet printing, minimizing agglomeration and adhesion, while maintaining luminescent properties and facilitating large-area film formation.
Implementation Method 1
The luminescent properties of the luminescent nanostructures may be applied to various electronic devices (e.g., display devices), for which the luminescent nanostructures or a composite including the luminescent nanostructure may have the form of a film or a pattern
Implementation Method 2
An ink composition includes a plurality of titanium oxide particles, a plurality of luminescent nanostructures (e.g., quantum dots), a monomer comprising a carbon-carbon unsaturated bond
Data Source
AI summary
An ink composition and luminescent nanostructure composite, and an electronic device including the luminescent nanostructure composite. The ink composition includes a plurality of titanium oxide particles, a plurality of luminescent nanostructures (e.g., quantum dots), a monomer including a carbon-carbon unsaturated bond, and optionally an organic solvent. The titanium oxide particles have an average size of greater than or equal to about 10 nm and less than or equal to about 900 nm, and the titanium oxide particles comprise an organosilane compound. The ink composition has a total solid content (TSC) of greater than or equal to about 90 wt %, and an amount of the titanium oxide particles in the ink composition is greater than or equal to about 1 wt % based on the total weight of the ink composition. The ink composition is configured to emit a first light.