Light Emitting Composite Core-Shell Structure
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Solution Overview
Problem
Light emitting elements like quantum dots suffer from poor dispersibility, moisture and oxygen sensitivity, and low thermal stability, which limits their application in devices.
Innovation Solution
A light emitting composite is formed through a condensation polymerization reaction between a light emitting element and a three-dimensional protection structure, creating a core-shell structure with improved dispersibility and thermal stability, using polymerizable functional groups and organometal compounds for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are used in solvent or polymer, then light emission function is achieved, but dispersibility deteriorates due to agglomeration
Solution Approach 1:
A shell structure comprising a first shell and a second shell is formed around the light emitting element. The first shell includes an inorganic material layer that provides physical separation and prevents direct contact between light emitting elements. The second shell includes an organic material layer that provides chemical compatibility with the polymer matrix. This dual-shell structure effectively prevents agglomeration while maintaining dispersibility in the polymer composite.
2Reliability
If light emitting elements are exposed to air, then light emission function is achieved, but reliability deteriorates due to oxidation from moisture and oxygen
Solution Approach 1:
The shell structure creates an inert protective environment around the light emitting element. The inorganic material layer in the first shell acts as a barrier to moisture and oxygen penetration. The organic material layer in the second shell provides additional chemical protection. This layered protective structure isolates the light emitting element from harmful environmental factors, preventing oxidation and improving long-term reliability.
3Stability of the object's composition
If light emitting elements are used without protection, then light emission function is achieved, but thermal stability deteriorates
Solution Approach 1:
The shell structure utilizes composite materials to enhance thermal stability. The inorganic material layer in the first shell provides high thermal resistance and structural stability at elevated temperatures. The organic material layer in the second shell provides thermal management properties and compatibility with the polymer matrix. This composite shell structure protects the light emitting element from thermal degradation while maintaining operational performance.
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 composite exhibits improved dispersibility, reliability, and thermal stability, effectively applied in electronic devices such as optical sheets and display panels, with reduced weight loss and increased photoluminescence efficiency.
Implementation Method 1
semiconductor nanocrystals, also known as quantum dots, are supplied with photoenergy or electrical energy and may emit light in a wavelength corresponding to sizes of the quantum dots
Implementation Method 2
A light emitting composite is formed through a condensation polymerization reaction between a light emitting element and a three-dimensional protection structure
Implementation Method 3
using polymerizable functional groups and organometal compounds for enhanced stability
Data Source
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AI summary
A light emitting composite includes a light emitting element and a three dimensional protection structure bound to the light emitting element and surrounding the light emitting element. The three dimensional protection structure includes a SiO3/2 moiety and a polymerizable functional group. A light emitting structure, an optical sheet, and an electronic device are also disclosed.