Crosslinkable Quantum Dot Polymer Composition for Quench-Free Dispersion
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Solution Overview
Problem
Quantum dot compositions used in display devices suffer from poor luminous efficiency due to quantum dot quenching caused by modifying quantum dot materials, leading to poor dispersion and performance.
Innovation Solution
A polymer with a specific repeating unit structure is introduced, which can be crosslinked with a monomer to enhance dispersion and form patterned films, combined with quantum dots to improve luminous efficiency in light-emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If modified quantum dot materials are used to increase dispersion, then dispersion is improved, but quantum dot quenching occurs resulting in poor luminous efficiency
Solution Approach 1:
The patent introduces a polymer binder as an intermediary substance that mediates between the quantum dot materials and the composition matrix. This polymer binder enables uniform dispersion of quantum dot materials without requiring modification of the quantum dots themselves, thereby preventing quantum dot quenching while achieving improved dispersion. The polymer acts as a bridging element that facilitates compatibility and uniform distribution.
Solution Approach 2:
The patent changes the parameter of the composition by introducing a specific polymer binder with particular properties (molecular weight, functional groups) rather than modifying the quantum dot materials. This parameter change in the binder system allows achieving good dispersion while maintaining quantum dot luminescence efficiency, resolving the contradiction between dispersion and luminous efficiency.
2Loss of energy
If non-modified quantum dot materials are used to prevent quenching, then luminous efficiency is improved, but dispersion in the composition is poor
Solution Approach 1:
The polymer binder serves as an intermediary that enables non-modified quantum dot materials to disperse uniformly in the composition. The binder molecules interact with the quantum dot surfaces and the composition matrix, facilitating dispersion without requiring chemical modification of the quantum dots, thus preserving their luminescence efficiency while achieving uniform distribution.
Solution Approach 2:
The patent creates a composite material system consisting of non-modified quantum dot materials combined with a specifically designed polymer binder. This composite approach allows the quantum dots to maintain their intrinsic luminescence properties while the polymer binder provides the necessary dispersion and stability in the composition, resolving the contradiction between maintaining high luminous efficiency and achieving good dispersion.
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 polymer-enhanced quantum dot composition improves luminous efficiency and enables patterned films, addressing the quenching issue and enhancing the performance of display devices.
Implementation Method 1
A polymer with a specific repeating unit structure is introduced, which can be crosslinked with a monomer to enhance charge transport and optoelectronic properties
Implementation Method 2
The quantum dot is a material having good light absorption and light-emission properties, and has properties such as a narrow Full-Width-of-Half Maximum (FWHM) value, a high luminous efficiency, a wide absorption spectrum, and high color purity and saturation
Data Source
AI summary
A polymer, a quantum dot composition, and a light-emitting device employing the same are provided. The polymer includes a first repeat unit that has a structure represented by Formula (I):wherein the definitions of R1, R2, A1, A2, A3, and Z1 and n are as defined in the specification.