Trimetallic Complex Rigid Ligand Structure for OLED Stability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current organic light-emitting devices face challenges in stability and efficiency due to excimer formation, which affects the lifespan and performance of the devices.

Innovation Solution

A trimetallic complex represented by Formula 1 is introduced, which improves stability by creating a more rigid ligand structure and inhibits excimer formation, enhancing the efficiency and lifespan of the light-emitting device by being incorporated into the emission layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional organic light-emitting devices are used, then device operation is achieved, but stability and efficiency deteriorate due to excimer formation

Engineering Contradiction:

Improvedevice stabilityVSAvoidexcimer formation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the molecular structure parameter by introducing a trimetallic complex with a rigid ligand structure. This structural parameter change prevents excimer formation by maintaining fixed molecular spacing and orientation, thereby improving device stability and efficiency without sacrificing light-emitting function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite trimetallic complex comprising three different metals coordinated with organic ligands. This composite structure combines the benefits of multiple metals to create a rigid framework that prevents excimer formation while enhancing overall device performance through synergistic effects

Inventive Principle:

Principle #40Composite materials

2Illumination intensity

If excimer formation occurs, then light emission is produced, but device lifespan and efficiency worsen

Engineering Contradiction:

Improvelight emissionVSAvoiddevice lifespan

Core Design Contradiction:

Illumination intensityVSDuration of action of stationary object

Solution Approach 1:

By changing the molecular rigidity parameter through trimetallic complex design, the patent maintains efficient light emission while preventing the molecular rearrangements that lead to excimer formation. This preserves device lifespan without compromising illumination intensity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of close molecular interactions (which cause excimer formation) into a benefit by using the rigid trimetallic structure to enforce optimal spacing. This controlled proximity maintains emission efficiency while preventing degradation

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 trimetallic complex improves the stability and efficiency of the light-emitting device by reducing excimer formation, leading to enhanced performance and longer lifespan.

Implementation Method 1

Organic light-emitting devices are self-emission devices that have wide viewing angles, high contrast ratios, short response times, and excellent characteristics in terms of brightness, driving voltage, and response speed

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Implementation Method 2

A trimetallic complex represented by Formula 1 is introduced, which improves stability by creating a more rigid ligand structure and inhibits excimer formation

Methodology Applied

Scientific EffectExcimer formation inhibition:

Data Source

PatentUS11864459B2Compound and light emitting device including the same

Publication Date: 2024.01.02 SAMSUNG DISPLAY CO LTD

AI summary

A trimetallic complex and a light-emitting device including the same are provided. The trimetallic complex is represented by Formula 1: