Organic Modification Layer for QLED Surface Defect Passivation

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Solution Overview

Problem

Conventional quantum dot light-emitting diodes (QLEDs) suffer from low luminous efficiency and require improvements in surface defects and carrier transport efficiency.

Innovation Solution

Incorporation of an organic compound with specific structural formulas in the optoelectronic device, acting as a modification layer between the hole functional layer and quantum dot layer to chelate uncoordinated metals, improving surface defects and enhancing carrier transport efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If conventional QLED structure is used, then device can be manufactured with standard layers, but luminous efficiency is low

Engineering Contradiction:

Improveluminous efficiencyVSAvoiddevice performance stability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent introduces a modification layer containing the organic compound as an intermediary between the hole functional layer and quantum dot layer. This layer mediates the interaction between carriers and quantum dots, reducing energy loss at interfaces and improving overall luminous efficiency through enhanced carrier transport and reduced recombination losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the device structure by changing the chemical composition parameters of the modification layer, using organic compounds with specific molecular structures (containing nitrogen-containing heterocyclic groups and specific functional groups). This parameter change optimizes carrier transport properties and improves luminous efficiency.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If conventional QLED structure is used, then manufacturing process is simple, but surface defects are high

Engineering Contradiction:

Improvesurface defect qualityVSAvoiddevice structure complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The modification layer acts as an intermediary that passivates surface defects on the quantum dot layer and improves the interface quality between functional layers. This reduces surface recombination centers and improves manufacturing precision without requiring complex processing steps.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses composite material strategy by combining the organic compound with the existing QLED layers to form a multi-layer structure. The organic compound integrates with both the hole functional layer and quantum dot layer, creating a composite system that reduces surface defects while maintaining manufacturing simplicity.

Inventive Principle:

Principle #40Composite materials

3Productivity

If conventional QLED structure is used, then carrier transport is basic, but carrier transport efficiency is low

Engineering Contradiction:

Improvecarrier transport efficiencyVSAvoidenergy loss in carrier transport

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent changes the chemical composition parameters of the modification layer using organic compounds with specific electron transport capabilities. This improves carrier transport efficiency by optimizing the energy levels and transport properties at the interface between the hole functional layer and quantum dot layer, reducing energy loss.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The organic compound in the modification layer serves as an intermediary that facilitates efficient carrier transport from the hole functional layer to the quantum dot layer. It mediates the energy transfer process, reducing energy loss through improved orbital overlap and reduced recombination losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 organic compound enhances luminous efficiency and prolongs the lifetime of the optoelectronic device by modifying the surface and improving carrier transport.

Implementation Method 1

improving the surface defects of the films by chelating uncoordinated metals on the surfaces of the adjacent films

Methodology Applied

Scientific EffectChelation:

Data Source

PatentUS20260090189A1Organic compound and synthesis method thereof, and optoelectronic device

Publication Date: 2026.03.26 TCL TECHNOLOGY GROUP CORPORATION

AI summary

An organic compound and synthesis method thereof, and an optoelectronic device. The organic compound includes a compound represented by the general formula (1):By disposing a film including the organic compound between a hole functional layer and an electron functional layer of an optoelectronic device, the luminous efficiency of the optoelectronic device may be improved, and the lifetime of the optoelectronic device may be prolonged.