Amine-Based Compound for OLED Efficiency and Voltage Reduction

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Solution Overview

Problem

There is a continuous need for developing new materials to improve the efficiency and stability of organic light emitting devices, particularly in terms of driving voltage and lifetime characteristics.

Innovation Solution

An amine-based compound represented by Chemical Formula 1 is used as a material for various organic material layers in an organic light emitting device, including hole injection, hole transport, electron blocking, light emission, and electron transport layers, which enhances the device's efficiency and reduces driving voltage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional materials are used in organic light emitting devices, then the device structure is simple, but the efficiency is low and driving voltage is high

Engineering Contradiction:

Improvedevice efficiencyVSAvoidmaterial layer complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The amine-based compound of Formula 1 is designed to perform multiple functions simultaneously across different organic material layers. The compound can be used in hole injection layers, hole transport layers, electron blocking layers, light emitting layers, and electron transport layers, providing versatile functionality that improves device efficiency without requiring multiple specialized materials for each layer.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention modifies the chemical structure parameters of the organic material by introducing specific amine-based compounds with defined molecular formulas and structures. By changing the chemical composition parameters (using compounds with specific formulas where R1-R6 represent various organic groups), the device achieves improved efficiency and reduced driving voltage while maintaining structural organization.

Inventive Principle:

Principle #35Parameter changes

2Duration of action of stationary object

If traditional materials are used in organic light emitting devices, then the manufacturing process is simple, but the lifetime characteristics are poor

Engineering Contradiction:

Improvedevice lifetimeVSAvoidmanufacturing complexity

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The invention employs composite material strategies by combining the amine-based compound of Formula 1 with other organic materials in multi-layer structures. The compound is integrated into specific layers (hole injection, hole transport, electron blocking, light emitting, electron transport) where it works synergistically with adjacent layers to improve device lifetime through enhanced material compatibility and reduced degradation.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The amine-based compound is strategically placed in specific organic material layers where it provides localized improvement in device performance and stability. By concentrating the functional benefits in critical layers such as the hole transport and electron blocking layers, the invention extends device lifetime without requiring complete replacement of all materials, thus maintaining ease of manufacture.

Inventive Principle:

Principle #3Local quality

3Power

If traditional materials are used in organic light emitting devices, then the device structure is simple, but the driving voltage is high

Engineering Contradiction:

Improvedriving voltageVSAvoidorganic material layer complexity

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The amine-based compound of Formula 1 serves multiple functional roles that collectively reduce driving voltage. By providing hole injection, hole transport, electron blocking, and light emitting capabilities in a single versatile material platform, the compound reduces energy barriers at material interfaces and improves charge carrier mobility, thereby lowering the overall driving voltage required for device operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention changes the electrical and optical parameters of the organic material layers by introducing the amine-based compound with specific molecular characteristics. The compound's electronic structure parameters (HOMO/LUMO levels, charge mobility) are optimized to reduce voltage drops across layers, achieving lower driving voltage through controlled modification of material properties rather than increasing structural complexity.

Inventive Principle:

Principle #35Parameter changes

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 amine-based compound improves the efficiency and extends the lifetime of organic light emitting devices by effectively functioning in multiple layers, achieving lower driving voltage and better performance compared to traditional materials.

Implementation Method 1

holes are injected from a positive electrode into the organic material layer and electrons are injected from a negative electrode into the organic material layer, and when the injected holes and electrons meet each other, an exciton is formed

Methodology Applied

Scientific EffectCharge carrier transport: Conduction (electrical)