OLED Emissive Layer Host Compound for Low-Voltage Lifetime Gain

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

There is a need for new materials in organic light emitting devices to enhance efficiency and stability, particularly in achieving low driving voltage and improving lifetime characteristics.

Innovation Solution

A novel compound represented by Chemical Formula 1 is introduced, which can be used as a material in the organic light emitting device, specifically as a host in the light emitting layer, stabilizing electrons and maintaining the balance of holes and electrons, thereby improving efficiency and lifetime characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional organic materials are used in the light emitting layer, then the device structure is simple, but the efficiency and lifetime characteristics are insufficient

Engineering Contradiction:

Improveluminous efficiencyVSAvoiddevice lifetime

Core Design Contradiction:

ProductivityVSDuration of action of stationary object

Solution Approach 1:

The patent employs composite organic materials in the light emitting layer, combining multiple functional components (host materials, guest materials, and the novel compound of Formula 1) to achieve synergistic effects that simultaneously improve luminous efficiency and device lifetime characteristics

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional organic materials are used, then material selection is straightforward, but driving voltage remains high

Engineering Contradiction:

Improvematerial selectionVSAvoiddriving voltage

Core Design Contradiction:

Ease of manufactureVSPower

Solution Approach 1:

The patent modifies molecular parameters of organic materials by introducing specific chemical structures (Formula 1 with defined substituents and heteroatoms) to optimize electrical properties, thereby reducing driving voltage while maintaining ease of manufacturing through established synthesis routes

Inventive Principle:

Principle #35Parameter changes

3Productivity

If new organic materials are developed to improve efficiency, then luminous efficiency increases, but device complexity increases

Engineering Contradiction:

Improveluminous efficiencyVSAvoidmaterial structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies local quality by introducing the novel compound (Formula 1) specifically in the light emitting layer where it is most needed for efficiency enhancement, while keeping other device layers relatively simple and well-established, thus minimizing overall device complexity

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

The use of the novel compound in the organic light emitting device results in improved efficiency and extended lifetime characteristics, outperforming comparative examples by maintaining high luminous efficiency and prolonged device lifespan.

Implementation Method 1

an organic light emitting phenomenon refers to a phenomenon where electrical energy is converted into light energy by using an organic material

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12096686B2Compound and organic light emitting device comprising the same

Publication Date: 2024.09.17 LG CHEM LTD

AI summary

The present disclosure provides a novel compound represented by the following Chemical Formula 1, and an organic light emitting device including the same. The compound is used as a material of an organic material layer of the organic light emitting device.