Quantum Dot Light-Emitting Layers With Intermediate Quenching Barrier
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The configuration of existing light-emitting devices with an interface layer to prevent quenching requires a thick layer, which blocks hole injection and increases voltage, making it difficult to enhance thickness without compromising performance.
Innovation Solution
A light-emitting element with a first and second light-emitting layer containing quantum dots and an inorganic matrix material, separated by a first intermediate layer that acts as an energy barrier, maintaining a distance from charge transport layers to reduce quenching and voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the interface layer is made thick to prevent quenching, then quenching is reduced, but hole injection is blocked and voltage increases
Solution Approach 1:
The patent introduces a first intermediate layer between the first light-emitting layer and the second light-emitting layer. This intermediate layer acts as a mediator that maintains an appropriate distance between the light-emitting layers and charge transport layers, thereby reducing quenching effects while allowing hole injection to proceed efficiently without requiring a thick interface layer that would increase voltage.
Solution Approach 2:
The patent divides the light-emitting structure into multiple separate light-emitting layers (first light-emitting layer and second light-emitting layer) with an intermediate layer between them. This segmentation allows each layer to be optimized independently, enabling the intermediate layer to provide quenching protection while maintaining efficient charge injection pathways through the structured multi-layer configuration.
2Object-affected harmful factors
If the interface layer is made thick to prevent quenching, then quenching is reduced, but device complexity increases
Solution Approach 1:
The patent segments the light-emitting structure into multiple functional layers (first light-emitting layer, first intermediate layer, second light-emitting layer) with clear defined interfaces. This segmentation provides a systematic approach to managing quenching prevention while maintaining organized device architecture that is easier to manufacture and control compared to a single thick interface layer.
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
This configuration effectively reduces quenching and maintains efficient charge recombination, enhancing luminance and reducing voltage requirements while ensuring long-term reliability.
Implementation Method 1
a first intermediate layer provided between the first light-emitting layer and the second light-emitting layer
Implementation Method 2
a first light-emitting layer provided between the first electrode and the second electrode, and containing a plurality of first quantum dots
Data Source
AI summary
A light-emitting element includes: a first light-emitting layer provided between a first electrode and a second electrode, and containing a plurality of first quantum dots and a first inorganic matrix material filling spaces between the plurality of first quantum dots; a second light-emitting layer provided between the second electrode and the first light-emitting layer, and containing a plurality of second quantum dots and a second inorganic matrix material filling spaces between the plurality of second quantum dots, the second quantum dots emitting light in a same color as a color of light emitted from the plurality of first quantum dots; and a first intermediate layer provided between the first light-emitting layer and the second light-emitting layer.