Amine Compound for OLED Hole Injection and Charge Mobility

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Solution Overview

Problem

Current light-emitting devices face limitations in achieving high efficiency, low voltage, and long lifespan due to challenges in hole injection characteristics and charge mobility, particularly in organic light-emitting devices.

Innovation Solution

The use of an amine compound represented by Formula 1, which includes a specific structure with a tricyclic group and an alkane linking group, is introduced to improve hole injection and charge mobility by stabilizing polarons and increasing energy disorder, thereby enhancing the performance of organic light-emitting devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional organic light-emitting device materials are used, then device structure can be maintained, but hole injection characteristics and charge mobility are insufficient

Engineering Contradiction:

Improvehole injection characteristicsVSAvoidcharge mobility

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent modifies molecular parameters of the organic compound by introducing a specific structure comprising two amines linked via an alkane group, thereby changing electronic properties to improve both hole injection characteristics and charge mobility simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite molecular structure combining two amine groups connected by an alkane linker, forming a new compound class that exhibits synergistic effects for enhanced charge transport and hole injection properties

Inventive Principle:

Principle #40Composite materials

2Power

If higher efficiency is pursued, then luminance improves, but voltage requirements increase

Engineering Contradiction:

Improveluminance efficiencyVSAvoidvoltage

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The patent optimizes energy level parameters of the organic compound through structural modification, adjusting HOMO/LUMO levels to achieve high luminance efficiency at reduced operating voltages by improving charge injection and transport

Inventive Principle:

Principle #35Parameter changes

3Productivity

If charge mobility is increased, then device performance improves, but polaron stability decreases

Engineering Contradiction:

Improvecharge mobilityVSAvoidpolaron stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent introduces localized functional regions within the molecule - the alkane linker provides flexible local structure for charge delocalization while amine groups provide localized electron donation, achieving both high mobility and polaron stability through spatially differentiated functions

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20230200218A1Light-emitting device including amine compound, electronic apparatus including the light-emitting device, and the amine compound

Publication Date: 2023.06.22 SAMSUNG DISPLAY CO LTD

AI summary

Provided are an amine compound represented by Formula 1, a light-emitting device including the same, and an electronic apparatus including the light-emitting device. The light-emitting device includes: a first electrode; a second electrode facing the second electrode; an interlayer between the first electrode and the second electrode and including an emission layer; and at least one of the amine compound represented by Formula 1.