Semiconducting Nanoparticle Composition Stabilization
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Solution Overview
Problem
Current compositions of semiconducting light emitting nanoparticles and silicone resin face issues with dispersibility, polymerization during storage, long-term stability, and maintaining quantum yield, especially at higher concentrations.
Innovation Solution
A novel composition comprising semiconducting light emitting nanoparticles with a core and optional shell layers, a polymer with specific attaching groups, and a poly siloxane, formulated with a solvent like propylene glycol alkyl ether acetates, enhancing dispersibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semiconducting light emitting nanoparticles are dispersed in silicone resin, then the composition can be used in optical devices, but the dispersibility of nanoparticles deteriorates over time
Solution Approach 1:
The patent introduces a polymer as an intermediary substance between the semiconducting light emitting nanoparticles and silicone resin. This polymer contains specific functional groups that interact with both the nanoparticles and the silicone resin, acting as a bridge to improve and maintain dispersibility over time. The polymer prevents direct interaction between nanoparticles and silicone resin that would lead to aggregation, thereby maintaining stable dispersion throughout the product lifecycle.
Solution Approach 2:
The patent creates a composite material system consisting of semiconducting light emitting nanoparticles, polymer, and silicone resin. This composite structure allows each component to contribute its specific properties: nanoparticles provide light emission, polymer provides dispersibility and stability, and silicone resin provides the base matrix. The synergistic combination resolves the contradiction by integrating multiple materials with complementary functions.
2Ease of manufacture
If semiconducting light emitting nanoparticles are stored in silicone resin, then the formulation is ready for use, but polymerization of silicone resin occurs during storage
Solution Approach 1:
The polymer acts as a mediator that interferes with the polymerization process of silicone resin. By occupying interaction sites and creating steric hindrance, the polymer prevents the cross-linking reactions that would otherwise occur during storage. This allows the formulation to remain stable and ready for use without undergoing unwanted polymerization.
Solution Approach 2:
The patent applies preliminary anti-action by introducing the polymer before storage to prevent polymerization from occurring. The polymer is pre-mixed with the nanoparticles and silicone resin formulation, creating a stable dispersion that resists polymerization during storage. This preventive measure eliminates the need for additional stabilization steps before use.
3Illumination intensity
If higher concentration of semiconducting light emitting nanoparticles is used, then the light emission intensity increases, but dispersibility deteriorates
Solution Approach 1:
The polymer serves as a concentration-independent dispersant that maintains nanoparticle separation even at high concentrations. The functional groups on the polymer chain interact with nanoparticle surfaces, creating steric barriers that prevent aggregation. This intermediary action allows the formulation to achieve high light emission intensity through increased nanoparticle concentration without sacrificing dispersibility.
Solution Approach 2:
The patent changes the chemical parameters of the formulation by introducing a polymer with specific functional groups that alter the interaction dynamics between nanoparticles. This parameter change (adding polymer with attaching groups) enables the system to accommodate higher nanoparticle concentrations while maintaining stable dispersion, as the polymer modifies the effective interaction potential between particles.
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 composition achieves improved dispersibility, prevents polymerization, and maintains stable quantum yield over time, even at higher nanoparticle concentrations, making it suitable for electronic and optical devices.
Implementation Method 1
a polymer comprising, essentially consisting of, or consisting of, at least an attaching group selected from one or more member of the group consisting of phosphine groups, phosphine oxide groups, phosphate groups, phosphonate groups, thiol groups, carboxyl groups, hetero cyclic groups, silane groups, sulfonic acids, hydroxyl groups, and phosphonic acids
Implementation Method 2
A novel composition comprising semiconducting light emitting nanoparticles with a core and optional shell layers, a polymer with specific attaching groups, and a poly siloxane, formulated with a solvent like propylene glycol alkyl ether acetates, enhancing dispersibility and stability
Data Source
AI summary
The present invention relates to a composition comprising a semiconducting light emitting nanoparticle.