Quantum Dot-Polymer Composite Film for Stable Photoluminescence
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Solution Overview
Problem
Quantum dots used in manufacturing processes, such as heat treatment, often experience deterioration in photoluminescence characteristics, leading to a loss of original properties when integrated into composite films.
Innovation Solution
A quantum dot-polymer composite film is developed, comprising quantum dots with organic ligands, a cured product of photopolymerizable monomers with carbon-carbon unsaturated bonds, and residues of high-boiling point solvents or polyvalent metal compounds, which are processed using a method involving photolithography and heat treatment to form a stable patterned film without significant luminous efficiency loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If quantum dots are subjected to heat treatment and manufacturing processes, then the composite film can be formed and processed, but the photoluminescence characteristics of quantum dots deteriorate
Solution Approach 1:
The patent introduces a shell structure around the quantum dot core, where the shell acts as an intermediary protective layer that shields the quantum dot from harmful interactions with the polymer matrix and manufacturing processes, thereby maintaining photoluminescence characteristics while enabling composite film formation
Solution Approach 2:
The patent creates a core-shell composite quantum dot structure and subsequently integrates it into a polymer composite material system. This multi-level composite approach allows the quantum dots to retain their optical properties while being incorporated into a processable composite film matrix
2Adaptability or versatility
If quantum dots are integrated into polymer composite films, then the film can be manufactured with desired properties, but the quantum dots lose their original properties
Solution Approach 1:
The shell structure serves as a mediator between the quantum dot core and the polymer matrix, allowing the quantum dot to maintain its intrinsic properties while enabling integration into the polymer composite with desired film properties
Solution Approach 2:
The patent applies different material properties to different parts of the quantum dot structure - the core maintains high photoluminescence efficiency while the shell provides protective and interface properties, enabling both quantum dot stability and film versatility
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 effectively maintains the quantum dots' photoluminescence efficiency and stability throughout the manufacturing process, ensuring the film's performance in applications like displays and solar cells.
Implementation Method 1
a cured product of a photopolymerizable monomer including a carbon-carbon unsaturated bond
Data Source
AI summary
A quantum dot-polymer composite film includes: a plurality of quantum dots, wherein a quantum dot of the plurality of quantum dots includes an organic ligand on a surface of a the quantum dot; a cured product of a photopolymerizable monomer including a carbon-carbon unsaturated bond; and a residue including a residue of a high-boiling point solvent, a residue of a polyvalent metal compound, or a combination thereof.