Quantum Dot Light-Emitting Element With Fluorine Interface Film

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Light-emitting elements using known quantum dot compositions exhibit low luminous efficiency.

Innovation Solution

A light-emitting element configuration including a first and second electrode, a light-emitting layer with quantum dots and fluorine, a first and second function layer, and a fluorine-containing film between the function layers, with a fluorine-terminated organic compound as a ligand to improve wettability and carrier balance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a known quantum dot composition is used, then the device structure is simple, but the luminous efficiency is low

Engineering Contradiction:

Improveluminous efficiencyVSAvoiddevice structure

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

A fluorine-containing film is introduced as an intermediary layer between the first function layer and the light-emitting layer. This film mediates the interaction between the quantum dots and the function layers, improving carrier balance and reducing interface defects, thereby enhancing luminous efficiency without fundamentally changing the overall device structure

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the chemical composition parameters of the interface layers by incorporating fluorine-containing compounds. Specifically, a fluorine-containing film with specific chemical properties (containing fluorine atoms in its molecular structure) is used to alter the interfacial properties, improving carrier transport and reducing non-radiative recombination, which directly enhances luminous efficiency

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a known quantum dot composition is used, then the manufacturing process is simple, but the reliability is low

Engineering Contradiction:

Improvedevice reliabilityVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The fluorine-containing film is formed in advance before applying the quantum dot solution. This preliminary action prepares the interface with optimal properties for subsequent quantum dot deposition, ensuring better adhesion and reduced interface defects from the outset, which improves device reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The fluorine-containing film serves as a protective intermediary layer that prevents direct contact between the quantum dots and the function layers, reducing interface defects and improving device stability and reliability during operation

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If quantum dots are applied directly onto function layers, then the manufacturing process is simple, but carrier path variations and interface defects increase

Engineering Contradiction:

Improveinterface qualityVSAvoidlayer structure

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The fluorine-containing film acts as an intermediary layer between the function layers and quantum dots, providing a controlled interface that reduces defect formation and ensures uniform carrier paths, thereby improving manufacturing precision at the interface

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The fluorine-containing film provides localized improvement at the critical interface region between the function layers and quantum dots. By concentrating the fluorine-containing material specifically at this interface, the patent improves local interfacial properties (carrier transport, adhesion, defect reduction) without unnecessarily complicating the entire device structure

Inventive Principle:

Principle #3Local quality

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

Enhances luminous efficiency and reliability by reducing carrier path variations and interface defects, improving light emission distribution and external quantum efficiency.

Implementation Method 1

improve wettability and carrier balance

Methodology Applied

Scientific EffectWetting: Wetting

Data Source

PatentUS20260006981A1Light-emitting element, display device, and method for manufacturing light-emitting element

Publication Date: 2026.01.01 SHARP DISPLAY TECHNOLOGY CORP

AI summary

A light-emitting element includes a light-emitting layer located between a first electrode and a second electrode, the light-emitting layer including quantum dots and including fluorine, a first function layer located between the first electrode and the light-emitting layer, a second function layer located between the second electrode and the light-emitting layer, and a fluorine-containing film located between the first function layer and the second function layer.