Amine Compound Hole Transport Layer for OLED Efficiency

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Solution Overview

Problem

Existing light-emitting elements for display devices face challenges in achieving high luminous efficiency and long lifespan, particularly in the hole transport region where materials with excellent stability and hole transport ability are required.

Innovation Solution

Incorporating an amine compound represented by Formula 1 into the hole transport region of the light-emitting element, which includes a functional layer with specific structural components that enhance hole transport and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional materials are used in the hole transport region, then device structure is simple, but luminous efficiency and lifespan are insufficient

Engineering Contradiction:

Improveluminous efficiencyVSAvoidmaterial structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent modifies the chemical structure parameters of hole transport materials by introducing specific amine compounds with defined molecular formulas (Formula 1 and Formula 2) and structural characteristics (Ar1-Ar3 groups, L1 linkers, R1 substituents). These parameter changes in molecular structure lead to improved luminous efficiency and lifespan while maintaining reasonable device complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material strategies by combining the newly developed amine compounds (Formulas 1 and 2) with other functional materials in the hole transport region. This composite approach integrates multiple material properties to achieve high luminous efficiency and long lifespan, balancing performance improvement with manageable device complexity

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If conventional hole transport materials are used, then device manufacturing is simple, but element lifespan is limited

Engineering Contradiction:

Improveelement lifespanVSAvoidmaterial synthesis complexity

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The patent achieves extended element lifespan by changing the chemical parameters of hole transport materials to specific amine compounds (Formulas 1 and 2) with enhanced stability characteristics. The structural parameters (Ar1-Ar3, L1, R1) are optimized to improve material durability and resistance to degradation, thereby extending operational lifespan

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent develops amine compounds that can be synthesized through relatively straightforward chemical routes, making them cost-effective despite improved performance. The materials are designed to provide extended lifespan at reasonable manufacturing costs, replacing expensive or complex alternative materials

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Productivity

If standard hole transport materials are used, then device structure is simple, but hole transport ability is insufficient

Engineering Contradiction:

Improvehole transport abilityVSAvoidfunctional layer structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies local quality enhancement by introducing specific amine compounds (Formulas 1 and 2) with tailored molecular structures into the hole transport region. The local structural characteristics (Ar1-Ar3 groups, L1 linkers, R1 substituents) are optimized to improve hole transport ability in this specific functional region without requiring complex changes throughout the entire device structure

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250040427A1Light-emitting element, amine compound for the light-emitting element, and electronic device including the light-emitting element

Publication Date: 2025.01.30 SAMSUNG DISPLAY CO LTD

AI summary

A light-emitting element includes a first electrode, a second electrode on the first electrode, and at least one functional layer between the first electrode and the second electrode and containing an amine compound represented by Formula 1.