Condensed Cyclic Compound Electron Transport Material for OLED Efficiency

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Solution Overview

Problem

Current organic light-emitting devices face limitations in achieving high efficiency and stability due to the lack of effective electron transport materials with appropriate energy levels.

Innovation Solution

A condensed cyclic compound represented by Formula 1 is introduced, which can be used as an electron transport material in organic light-emitting devices, providing the necessary energy level and stability for enhanced efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional electron transport materials are used in organic light-emitting devices, then the device structure is simple and ease of manufacture is maintained, but the efficiency and stability are insufficient

Engineering Contradiction:

Improvedevice efficiencyVSAvoiddevice stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent modifies the molecular structure parameters of electron transport materials by introducing specific substituents (fluoro, cyano, amino groups) and adjusting molecular weight and energy levels to simultaneously improve device efficiency and stability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent develops composite electron transport materials combining multiple functional groups and molecular components to achieve both high efficiency and stability, creating materials that integrate electron transport, hole blocking, and energy level tuning capabilities

Inventive Principle:

Principle #40Composite materials

2Productivity

If electron transport materials with appropriate energy levels are developed, then device efficiency is improved, but material complexity and device complexity increase

Engineering Contradiction:

Improvedevice efficiencyVSAvoidmaterial structure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces specific functional groups and substituents at particular positions in the molecular structure to locally enhance electron transport capability and energy level alignment without requiring complete redesign of the entire material system

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent systematically adjusts molecular parameters such as substituent types, molecular weight ranges (200-500 Da), and energy levels to optimize efficiency while maintaining manageable material 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 use of the condensed cyclic compound results in an organic light-emitting device with improved efficiency and stability, suitable for applications as an electron transport material.

Implementation Method 1

Methodology Applied

Scientific EffectElectron transport: Conduction (electrical)

Data Source

PatentUS9899611B2Condensed cyclic compound and organic light-emitting device including the same

Publication Date: 2018.02.20 SAMSUNG DISPLAY CO LTD

AI summary

A condensed cyclic compound and an organic light-emitting device, the condensed cyclic compound being represented by Formula 1 below: