Organic Electronic Element Host Compound for Lower Driving Voltage

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Solution Overview

Problem

Existing organic light-emitting materials face issues with efficiency, color purity, and lifespan due to intermolecular interactions, leading to increased power consumption and reduced luminous efficiency, particularly in large portable displays.

Innovation Solution

A compound represented by a specific formula is used as a host material in the light-emitting layer, optimizing energy levels and T1 values to lower driving voltage and enhance luminous efficiency and lifetime.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a host/dopant system is used to enhance color purity and luminous efficiency, then energy transfer efficiency is improved, but driving voltage increases and crystallization occurs due to Joule heating

Engineering Contradiction:

Improveluminous efficiencyVSAvoiddriving voltage

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent changes the energy level parameters of the host material by introducing specific heteroaryl groups and adjusting molecular structure. This optimization of energy levels enables efficient energy transfer to dopants while reducing the driving voltage required, thereby resolving the contradiction between luminous efficiency and energy consumption

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite host materials combining specific core structures with heteroaryl groups. This composite approach allows simultaneous optimization of energy transfer properties for high luminous efficiency and electrical properties for low driving voltage, resolving the technical contradiction

Inventive Principle:

Principle #40Composite materials

2Productivity

If driving voltage is increased to improve luminous efficiency, then light output is enhanced, but Joule heating increases causing crystallization and reduced lifetime

Engineering Contradiction:

Improveluminous efficiencyVSAvoidlifetime

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent optimizes the T1 values and energy levels of the host material through molecular structure design. This parameter optimization enables efficient energy transfer at lower driving voltages, reducing Joule heating and preventing crystallization, thus extending device lifetime while maintaining high luminous efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of energy transfer inefficiency into benefit by designing host materials with optimized energy levels. The optimized energy levels ensure efficient energy transfer to dopants, preventing energy loss as heat and thereby preventing crystallization and device degradation

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Device complexity

If only one light emitting material is used, then device structure is simplified, but color purity decreases and luminous efficiency is reduced due to intermolecular interactions

Engineering Contradiction:

Improvematerial layer structureVSAvoidluminous efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent applies local quality by introducing specific heteroaryl groups at particular positions in the molecular structure. This localized structural modification optimizes energy levels and intermolecular interactions, enabling high luminous efficiency and color purity while maintaining a relatively simple device structure

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes molecular parameters such as energy levels and HOMO-LUMO gaps through heteroaryl group introduction. These parameter changes enable efficient energy transfer and reduce intermolecular interactions, achieving high luminous efficiency without requiring complex multi-material structures

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 compound significantly improves luminous efficiency and extends the lifetime of organic electric elements by optimizing energy levels and T1 values, reducing driving voltage and minimizing crystallization due to Joule heating.

Implementation Method 1

excitons generated in the light emitting layer are transported to the dopant, thus emitting light with high efficiency

Methodology Applied

Scientific EffectEnergy transfer: Fluorescence

Implementation Method 2

crystallization of an organic material due to Joule heating generated during operation is reduced

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS12419191B2Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof

Publication Date: 2025.09.16 DUK SAN NEOLUX

AI summary

The present invention provides the compound represented by Formula 1, an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and an electronic device comprising the organic electric element, and by employing the compound represented by Formula 1 in the organic material layer, the driving voltage of the organic electric element can be lowered, and the luminous efficiency and life time of the electric element can be improved.