Amine Compound for OLED Efficiency and Lifespan

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing organic light emitting devices face challenges in achieving high efficiency and long lifespan due to limitations in materials used for hole injection, transfer, and electron injection layers, which affect the overall performance and stability of the devices.

Innovation Solution

The development of a specific amine compound represented by Chemical Formula 1, which can be used in various organic material layers, including hole injection, transfer, emission, electron transfer, and injection layers, enhancing the device's efficiency and lifespan by reducing driving voltage and improving stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional materials are used in organic light emitting devices, then the device structure can be maintained, but the efficiency and lifespan are limited

Engineering Contradiction:

Improvedevice efficiencyVSAvoiddevice lifespan

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies the chemical structure of amine compounds by changing molecular weight, substituent groups, and molecular architecture to optimize both efficiency and lifespan. Specific structural parameters like molecular weight range (200-500 Da) and substituent types are adjusted to achieve balanced performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite organic material layers combining multiple functional compounds including amine-based hole transport materials, electron transport materials, and host/guest dopant systems to achieve synergistic effects that improve both efficiency and device stability

Inventive Principle:

Principle #40Composite materials

2Use of energy by moving object

If driving voltage is reduced to improve efficiency, then energy consumption decreases, but material performance requirements increase

Engineering Contradiction:

Improvedriving voltageVSAvoidmaterial performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent optimizes material parameters including HOMO/LUMO energy levels, mobility, and molecular structure to enable low-voltage operation. The amine compounds are designed with specific energy level alignments that facilitate efficient charge injection and transport at reduced voltages

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention introduces intermediate organic material layers with graded energy levels and optimized transport properties that mediate between electrodes and active layers, enabling voltage reduction while maintaining performance through progressive charge transfer

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If multi-functional materials are used to simplify device structure, then layer complexity reduces, but material design difficulty increases

Engineering Contradiction:

Improvelayer structureVSAvoidmaterial design

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

The patent develops amine compounds that can serve multiple functions including hole transport, electron blocking, and charge recombination management within single layers, reducing the total number of required layers while maintaining device performance

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention divides complex multi-functional materials into modular molecular building blocks that can be systematically combined and optimized, making the design process more manageable through structured molecular engineering

Inventive Principle:

Principle #1Segmentation

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 amine compound improves the efficiency and lifespan of organic light emitting devices by effectively functioning as a material in multiple layers, specifically reducing driving voltage and enhancing electron blocking and hole transfer capabilities.

Implementation Method 1

one or more layers of the organic material layers include the compound of Chemical Formula 1... enhancing the device's efficiency and lifespan by reducing driving voltage and improving stability... enhancing electron blocking and hole transfer capabilities

Methodology Applied

Scientific EffectHole transfer: Conduction (electrical)

Implementation Method 2

enhancing electron blocking and hole transfer capabilities

Methodology Applied

Scientific EffectElectron blocking: Electrical Resistance

Implementation Method 3

An organic light emission phenomenon generally refers to a phenomenon converting electrical energy to light energy using an organic material

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentEP3369727B1Amine compound and organic light emitting element comprising same

Publication Date: 2021.12.22 LG CHEM LTD

Figure 1~2

AI summary

The present specification provides an amine compound of Chemical Formula 1 and an organic light emitting device including the same.