Organic Electroluminescent Compounds for Low-Voltage, Long-Life Devices

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing organic electroluminescent devices face challenges in achieving low driving voltage, high luminous efficiency, and long lifespan, with existing materials not meeting the requirements for high-resolution displays and long-term use.

Innovation Solution

The development of an organic electroluminescent compound and a combination of host materials, represented by specific formulas, which include substituted or unsubstituted triazinyl, pyridyl, and heteroarylene groups, to enhance the performance of organic electroluminescent devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional phosphor materials are used in OLEDs, then luminous efficiency can be maintained, but driving voltage remains high and lifespan is limited

Engineering Contradiction:

Improveluminous efficiencyVSAvoidlifespan

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent changes the chemical structure parameters of the host material by introducing specific heteroaryl groups (triazinyl, pyridyl, pyrimidinyl, quinazolinyl, quinoxalinyl, benzoquinoxalinyl) and controlling substitution patterns. These structural parameter changes lead to improved charge transport and exciton management, achieving both high luminous efficiency and extended device lifespan simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite host materials by combining multiple heteroaryl moieties in specific molecular architectures (formulas 1, 2, and 2'). These composite structures integrate the beneficial properties of different heteroaryl groups, resulting in materials that simultaneously achieve high efficiency and long operational stability

Inventive Principle:

Principle #40Composite materials

2Device complexity

If conventional host materials are used, then device structure can be kept simple, but driving voltage is high and performance is insufficient for high-resolution displays

Engineering Contradiction:

Improvematerial structureVSAvoiddriving voltage

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies local quality by introducing specific functional heteroaryl groups (triazinyl, pyridyl, etc.) at strategic positions within the host molecule structure. These localized structural modifications optimize charge transport and exciton confinement in specific regions of the molecule, enabling low driving voltage operation while maintaining overall structural simplicity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the host material structure into distinct functional modules: core heteroaryl units (formulas 1 and 2) and substituent groups (formula 2'). This segmentation allows independent optimization of different molecular functions while maintaining overall structural simplicity and ease of synthesis

Inventive Principle:

Principle #1Segmentation

3Reliability

If existing organic layer materials are proposed, then some performance improvements may be achieved, but they are not satisfactory for long-term use and high resolution displays

Engineering Contradiction:

ImproveperformanceVSAvoidlong-term use

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent designs host materials with inherent structural features (stable heteroaryl cores, appropriate substitution patterns) that preemptively protect against degradation mechanisms. The molecular structure is engineered to resist oxidation, maintain morphological stability, and prevent exciton-polaron annihilation, ensuring long-term operational durability from the outset

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent develops small-molecule host materials that can be efficiently deposited and replaced if needed, providing a cost-effective solution for achieving high performance and longevity without requiring complex or expensive material systems

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 proposed compounds and host materials result in devices with lower driving voltage, higher luminous efficiency, and improved lifespan, suitable for use in displays and lighting applications.

Implementation Method 1

Organic electroluminescent compound, a plurality of host materials and organic electroluminescent device comprising the same

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20250313571A1Organic electroluminescent compound, a plurality of host materials and organic electroluminescent device comprising the same

Publication Date: 2025.10.09 DUPONT SPECIALTY MATERIALS KOREA LTD

AI summary

The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent device with improved driving voltage and/or power efficiency can be provided by using the organic electroluminescent compound according to the present disclosure.