Amine Compound Hole Transport for Light-Emitting Element Longevity
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Solution Overview
Problem
Existing organic electroluminescence display devices face challenges in achieving high luminous efficiency and service life for light emitting elements.
Innovation Solution
Incorporation of a specific amine compound in the hole transport region of a light emitting element, characterized by certain aryl and heteroaryl groups, enhances the luminous efficiency and service life of the element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in the hole transport region, then the device structure remains simple, but luminous efficiency and service life are insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of hole transport materials by introducing specific amine compounds with defined molecular formulas (Formula 1, 1-A, 1-B, 1-C) and structural characteristics (aromatic rings, heteroaryl groups, substituent patterns). These parameter changes in molecular structure directly improve the reliability and service life of the light emitting element while maintaining manageable structural complexity through systematic design
Solution Approach 2:
The patent employs composite material strategies by combining the specific amine compound (Formula 1) with other functional materials in the hole transport region, creating a multi-component system that achieves enhanced luminous efficiency and service life. The composite approach allows synergistic effects between different materials while distributing functional requirements across multiple components
2Productivity
If conventional materials are used in the hole transport region, then the material selection is simple, but luminous efficiency is insufficient
Solution Approach 1:
The patent applies local quality by optimizing the chemical composition specifically in the hole transport region with tailored amine compounds (Formula 1 and variants), while other regions of the light emitting element may use different material systems. This localized optimization of material properties in the hole transport region directly enhances luminous efficiency without requiring complexification of the entire device structure
Solution Approach 2:
The patent systematically varies molecular parameters of the amine compound including aromatic ring substitutions (Ar1-Ar5), heteroaryl group configurations (Formula 2), and substituent types (R1-R6), to optimize hole transport properties and recombination efficiency. These parameter changes in material composition improve luminous efficiency while maintaining structured complexity through rational molecular design
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 amine compound improves luminous efficiency and extends the service life of the light emitting element, contributing to better performance in display devices.
Implementation Method 1
a hole transport region disposed on the first electrode
Implementation Method 2
holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer, so that a luminescent material in the emission layer emits light
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Embodiments provide an amine compound, a light emitting element that includes the amine compound, and a display device that includes the light emitting element. The light emitting element includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region includes the amine compound. The amine compound is represented by Formula 1, which is explained in the specification.