Amine Compound Hole Transport Material for OLED Efficiency

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current organic electroluminescence devices face challenges in achieving high efficiency, long life, and low driving voltage due to limitations in hole transport materials, particularly in terms of charge tolerance and molecular stacking properties.

Innovation Solution

An amine compound represented by specific formulas, including substituted aryl and heteroaryl groups, is used as a hole transport material in the device, enhancing charge tolerance and molecular stacking, thereby improving efficiency and extending device life while reducing driving voltage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional hole transport materials are used, then device structure is simple, but efficiency is low and device life is short

Engineering Contradiction:

Improvedevice efficiencyVSAvoidmolecular structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent modifies molecular parameters by introducing specific heteroaryl groups (triazole, tetrazole, oxadiazole, thiadiazole) and adjusting substituent positions to optimize charge tolerance and hole transport properties, achieving high efficiency without excessive structural complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite molecular structures by combining aryl groups with heteroaryl groups containing nitrogen, oxygen, or sulfur atoms, resulting in materials that exhibit both high charge tolerance and efficient hole transport capabilities

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If hole transport materials with poor charge tolerance are used, then manufacturing is easier, but device life is short

Engineering Contradiction:

Improvedevice lifeVSAvoidmaterial synthesis difficulty

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The patent changes chemical parameters by incorporating heteroatoms (N, O, S) in specific positions within the molecular structure to enhance charge tolerance, thereby extending device operational life while maintaining reasonable synthetic accessibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality modification by introducing heteroaryl groups at specific positions (Ar1 to Ar4) in the molecular structure, creating localized regions of high charge tolerance that extend device life without requiring complete structural redesign

Inventive Principle:

Principle #3Local quality

3Productivity

If materials with poor molecular stacking properties are used, then ease of operation is better, but efficiency is low

Engineering Contradiction:

Improvehole transport efficiencyVSAvoiddevice operation simplicity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent optimizes molecular geometry parameters through the selection of planar heteroaryl groups and aromatic substituents that promote favorable molecular stacking, enhancing hole transport efficiency while maintaining reasonable operational characteristics

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10580993B2Amine compound and organic electroluminescence device including the same

Publication Date: 2020.03.03 SAMSUNG DISPLAY CO LTD

AI summary

A amine compound and an organic electroluminescence device including the same, the amine compound being represented by Formula 1:In Formula 1, at least one of Ar1 to Ar4 is a substituted or unsubstituted heteroaryl group.