Organic Electric Element Compounds for Lower Voltage and Longer Lifespan

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Solution Overview

Problem

Existing organic electric elements face issues with high driving voltage, reduced efficiency, and shortened lifespan due to intermolecular interactions and energy transfer inefficiencies in light-emitting layers, necessitating the development of materials that enhance thermal stability and charge balance.

Innovation Solution

Incorporation of specific compounds represented by Formulas 1 to 6 into layers such as light-emitting auxiliary and light-emitting layers to optimize energy levels and T1 values, improving the efficiency and lifespan of the organic electric element.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a host/dopant system is used to enhance color purity and luminous efficiency, then luminous efficiency is improved, but driving voltage increases and lifespan decreases

Engineering Contradiction:

Improveluminous efficiencyVSAvoidelement lifespan

Core Design Contradiction:

ProductivityVSDuration of action of stationary object

Solution Approach 1:

The patent applies parameter changes by carefully adjusting the dopant concentration (0.1-10 wt%) and optimizing the energy level alignment between host and dopant materials. This resolves the contradiction by finding the optimal parameter range where high luminous efficiency is achieved without excessive driving voltage or reduced lifespan.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite host/dopant material systems where the host material provides structural framework and the dopant material provides efficient emission. This composite approach allows simultaneous optimization of color purity, luminous efficiency, and device stability, resolving the contradiction between efficiency and lifespan.

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If driving voltage is lowered to reduce Joule heating and extend lifespan, then element lifespan is improved, but luminous efficiency decreases

Engineering Contradiction:

Improveelement lifespanVSAvoidluminous efficiency

Core Design Contradiction:

Duration of action of stationary objectVSProductivity

Solution Approach 1:

The patent changes the energy level parameters of the organic materials to achieve better energy alignment. By selecting materials with appropriate HOMO/LUMO levels and optimizing the dopant concentration, the system achieves low driving voltage operation while maintaining high luminous efficiency, thus resolving the contradiction.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The host material acts as an intermediary that facilitates efficient energy transfer to the dopant. This intermediary system enables low-voltage operation by reducing energy loss and improving charge transport, thereby maintaining high efficiency while extending lifespan.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

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

Engineering Contradiction:

Improvematerial system complexityVSAvoidluminous efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent extracts the emission function from the host material by introducing a dopant material that is responsible for light emission. This separation allows the host to provide structural and transport functions while the dopant provides efficient, pure-color emission, resolving the contradiction between simplicity and efficiency.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs composite host/dopant materials where the host provides a stable matrix and the dopant provides efficient emission centers. This composite structure achieves high luminous efficiency and color purity while maintaining relatively simple device architecture.

Inventive Principle:

Principle #40Composite materials

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 proposed compounds lower the driving voltage and enhance luminous efficiency while extending the lifespan of the organic electric element by optimizing the energy levels and interfacial properties of the organic material layers.

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

a light emitting material and a charge transport material

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20250331412A1An organic electric element comprising compound for organic electric element and an electronic device thereof

Publication Date: 2025.10.23 DUK SAN NEOLUX

AI summary

Provides are an organic electric element and an electronic device thereof including at least one of the compounds represented by Formula 1 and Formula 2 in the light-emitting auxiliary layer, and at least one of the compounds represented by Formula 3 and Formula 4 in the light-emitting layer, wherein the driving voltage of the organic electric element can be lowered and the efficiency and lifespan thereof can be improved by the compounds included in the light-emitting auxiliary layer and the light-emitting layer.