Amine Compound Hole Transport for Efficient Light-Emitting Elements
Solution Overview
Problem
Existing light emitting elements in display devices, such as organic electroluminescence displays, face challenges in achieving high luminous efficiency and long service life, particularly in materials for hole transport regions that require improved stability and efficiency.
Innovation Solution
Incorporation of an amine compound represented by specific structural formulas in the functional layers of the light emitting element, including a hole transport region and electron transport region, to enhance luminous efficiency and extend the service life of the element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in hole transport regions, then device structure is simple, but luminous efficiency and service life are insufficient
Solution Approach 1:
The patent introduces specific amine compounds with defined molecular structures (Formula 1) containing nitrogen-containing six-membered aromatic rings and specific substituent groups. By changing the chemical parameters of the hole transport materials to these specific amine compounds, the service life and luminous efficiency are improved while maintaining manageable structural complexity through well-defined molecular formulas and synthesis routes.
Solution Approach 2:
The patent employs composite material strategies by combining specific amine compounds with other functional materials in the hole transport region. The amine compounds are used in conjunction with hole injection layers, hole transport layers, and emission layers, creating a composite functional system that achieves enhanced reliability and service life through synergistic material interactions.
2Productivity
If conventional hole transport materials are used, then manufacturing process is simple, but luminous efficiency is insufficient
Solution Approach 1:
The patent specifies precise chemical parameters for amine compounds including molecular weight ranges, substituent types (aryl groups with 6-30 carbon atoms), and structural configurations (Formula 1). These parameter specifications optimize luminous efficiency by enhancing charge transport properties and molecular packing, while the defined synthesis pathways maintain manufacturing feasibility through established organic chemistry techniques.
Solution Approach 2:
The amine compounds act as intermediary materials between the electrode and emission layer, facilitating efficient hole transport and injection. These compounds serve as mediators that improve the interface properties and charge carrier generation, thereby enhancing overall luminous efficiency without requiring fundamental changes to the manufacturing process architecture.
3Duration of action of stationary object
If standard emission materials are used, then device structure is simple, but element service life is short
Solution Approach 1:
The patent modifies the chemical parameters of materials in the functional layers by introducing specific amine compounds with enhanced stability characteristics. These compounds feature nitrogen-containing six-membered aromatic rings and specific substituent groups that improve molecular stability and resistance to degradation, thereby extending element service life while maintaining structured and organized functional layer configurations.
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 the luminous efficiency and extends the service life of the light emitting element, contributing to higher display quality in electronic apparatuses.
Implementation Method 1
holes and electrons separately injected from a first electrode and a second electrode of the light emitting element, recombing in an emission layer
Implementation Method 2
a luminescent material in the emission layer emits light due to the recombination of those holes and electrons
Data Source
AI summary
A light emitting element includes a first electrode, a second electrode on the first electrode, and at least one functional layer between the first electrode and the second electrode and including an amine compound represented by Formula 1.