Quantum Dot Resin Composition for Stable High-Loading Display Membranes
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Solution Overview
Problem
Existing semiconductor nanoparticle complexes used in display applications have insufficient strength, stability, and solvent resistance, leading to decreased fluorescence quantum yield when exposed to high temperatures and oxygen.
Innovation Solution
A semiconductor nanoparticle complex composition is developed, where semiconductor nanoparticles with a ligand coordinated to their surface are dispersed in a monomer or prepolymer medium, along with a crosslinking agent, achieving a mass fraction of semiconductor nanoparticles of 30% or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If semiconductor nanoparticles are dispersed in a resin to form a thin membrane for wavelength conversion, then the display structure is simplified and thickness is reduced, but the strength, stability, and solvent resistance become insufficient
Solution Approach 1:
The patent uses a composite material system consisting of semiconductor nanoparticles dispersed in a resin matrix to form a thin membrane. This composite structure allows the membrane to maintain sufficient strength and stability while achieving reduced thickness for display applications. The resin matrix provides mechanical support and the semiconductor nanoparticles provide the wavelength conversion function.
2Quantity of substance
If the mass fraction of semiconductor nanoparticles in the QD pattern is increased to improve light absorbance and prevent color mixing, then the wavelength conversion efficiency is improved, but the stability and solvent resistance decrease due to ligand detachment at high temperatures
Solution Approach 1:
The patent optimizes the mass fraction of semiconductor nanoparticles in the QD pattern to a specific range that balances light absorbance and stability. By carefully controlling this parameter, the patent achieves sufficient wavelength conversion efficiency while maintaining adequate stability and solvent resistance, preventing ligand detachment at high temperatures during display manufacturing processes.
3Ease of manufacture
If semiconductor nanoparticles are used without a polymer matrix component to achieve high mass fraction, then the manufacturing simplicity is improved, but the strength and stability become insufficient for display applications
Solution Approach 1:
The patent employs a composite material approach where semiconductor nanoparticles are dispersed in a resin matrix. This composite structure provides both the manufacturing simplicity of a single-layer formulation and the mechanical strength required for display applications, resolving the contradiction between ease of manufacture and membrane strength.
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 high fluorescence quantum yield and improved stability, preventing ligand detachment at high temperatures and maintaining efficient light emission characteristics.
Implementation Method 1
Semiconductor nanoparticles that are so small that a quantum confinement effect is exhibited have a bandgap that depends on the particle diameter
Implementation Method 2
Excitons formed in semiconductor nanoparticles by means of photoexcitation, charge injection, and the like, emit photons with energy corresponding to the band gap by recombination
Data Source
AI summary
Provided is a semiconductor nanoparticle complex composition and the like in which a semiconductor nanoparticle complex is dispersed at a high concentration and which has high fluorescence quantum yield. A semiconductor nanoparticle complex composition in which a semiconductor nanoparticle complex is dispersed in a dispersion medium, wherein: the semiconductor nanoparticle complex has a semiconductor nanoparticle and a ligand coordinated to the surface of the semiconductor nanoparticle; the ligand includes an organic group; the dispersion medium is a monomer or a prepolymer; the semiconductor nanoparticle complex composition further includes a crosslinking agent; and a mass fraction of the semiconductor nanoparticle in the semiconductor nanoparticle complex composition is 30% by mass or more.