Novel Hole Transport Compounds for OLED Efficiency

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

There is a continuing need for effective charge transport materials in organic photoactive electronic devices, such as OLEDs, where existing materials may not provide optimal performance in terms of hole transport and light emission efficiency.

Innovation Solution

The development of novel compounds and polymers with specific structural formulas, such as Formula I, which can be used as hole transport materials in electronic devices, including OLEDs, to enhance charge transport and light emission capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing charge transport materials are used in OLEDs, then device fabrication can proceed with conventional materials, but hole transport efficiency and light emission performance are suboptimal

Engineering Contradiction:

Improvehole transport efficiencyVSAvoidlight emission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent modifies the chemical structure of charge transport materials by introducing specific molecular formulas (Formula I with various aryl, heteroaryl, and amino group substitutions) to optimize hole transport properties. By changing molecular parameters such as aromatic ring substitutions and amino group positions, the material achieves both high hole transport efficiency and improved light emission performance simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention develops composite organic materials combining charge transport functions with light emission capabilities. The multifunctional compounds integrate hole transport moieties with electroluminescent groups, creating materials that perform multiple functions (charge transport and light emission) within a single layer, thereby improving overall device efficiency

Inventive Principle:

Principle #40Composite materials

2Reliability

If novel compounds with complex structures (Formula I) are synthesized, then hole transport and light emission efficiency improve, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvecharge transport performanceVSAvoidmolecular structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent designs universal charge transport materials with Formula I that can serve multiple functions: hole injection, hole transport, and light emission. The molecular structure incorporates versatile aryl and heteroaryl groups that can be systematically substituted to tune properties while maintaining the core multifunctional architecture, reducing the need for separate functional layers

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention applies local quality by introducing specific functional groups (amino groups, aryl groups, heteroaryl groups) at particular positions within the molecular framework. These localized substitutions optimize specific properties (hole transport at certain positions, light emission at others) while maintaining overall molecular stability and processability

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS7838627B2Compositions comprising novel compounds and polymers, and electronic devices made with such compositions

Publication Date: 2010.11.23 LG CHEM LTD

AI summary

The present invention relates to novel compounds and polymers, compositions comprising novel compounds or polymers, and electronic devices comprising at least one layer containing the compound or polymer.