Indole Derivative with Tertiary Amines for OLED Efficiency

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Solution Overview

Problem

Current organic electronic elements face inefficiencies in luminous efficiency, stability, and lifespan due to the limitations of materials used in their organic material layers, particularly in light emitting and charge transport layers.

Innovation Solution

A compound with an indole derivative having two substituted tertiary amines is developed, which can be used as a material for hole injection, transport, electron injection, light emission, and passivation, and can function as a light emitting material, host, or dopant, improving the performance of organic electronic elements by reducing driving voltage and enhancing luminous efficiency and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional organic materials are used in organic electronic elements, then the device can operate, but the luminous efficiency is low and the lifespan is short

Engineering Contradiction:

Improveluminous efficiencyVSAvoidenergy conversion efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent modifies the chemical structure of organic compounds by introducing specific functional groups (tertiary amines, indole derivatives) and adjusting molecular weight, HOMO/LUMO energy levels, and substituent positions to optimize charge transport and light emission properties, thereby improving luminous efficiency and device lifespan

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent develops composite organic material systems combining hole injection materials, hole transport materials, electron transport materials, and light emitting materials with specific molecular structures and energy level configurations to achieve synergistic effects that enhance overall device performance

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional organic materials are used in organic electronic elements, then the device can operate, but the stability is poor

Engineering Contradiction:

Improvedevice stabilityVSAvoiddevice lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent optimizes molecular stability parameters including glass transition temperature, thermal decomposition temperature, and chemical inertness of functional groups to enhance device operational stability and extend lifespan under various operating conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs chemically stable and inert functional groups and molecular structures that resist degradation from oxygen, moisture, and electrical stress, creating an intrinsically stable organic material system that maintains performance over extended periods

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

3Productivity

If only one light emitting material is used, then the device structure is simple, but the luminous efficiency decreases due to wavelength shift and reduced color purity

Engineering Contradiction:

Improveluminous efficiencyVSAvoidmaterial layer structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent employs host-dopant composite systems where a host material provides the primary emitting structure and a dopant material (with smaller energy band gap) introduces specific emission wavelengths, achieving high color purity and luminous efficiency through energy transfer while maintaining a manageable multi-component structure

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent designs organic compounds that can simultaneously serve multiple functions including charge transport, energy transfer, and light emission across different device layers, reducing the need for separate specialized materials and simplifying overall device architecture

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 compound significantly improves the luminous efficiency, stability, and lifespan of organic electronic elements by reducing driving voltage and enhancing color purity, making it suitable for various organic electronic devices such as OLEDs and solar cells.

Implementation Method 1

it is based on the principle that if a small amount of a dopant having a smaller energy band gap than a host forming an emitting layer is mixed with the emitting layer, excitons which are generated in the emitting layer are transported to the dopant, thus emitting a light having a high efficiency

Methodology Applied

Scientific EffectEnergy transfer:

Data Source

PatentUS9017828B2Compound including indole derivative in which two tertiary amines are substituted, organic electronic element using same, and terminal thereof

Publication Date: 2015.04.28 DUK SAN NEOLUX

AI summary

Disclosed are a compound represented by Formula below, including an indole derivative in which two tertiary amines are substituted, an organic electronic element using the same, and a terminal thereof.