Amine Compound in OLED Functional Layers for Efficiency and Lifespan
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Solution Overview
Problem
Existing organic electroluminescence display devices face challenges in achieving high emission efficiency and long lifespan, particularly in the development of materials for the hole transport region that exhibit enhanced hole transporting properties and stability.
Innovation Solution
Incorporation of an amine compound represented by Formula 1 into the functional layers of a light-emitting element, including a hole transport region and electron transport region, to enhance emission efficiency and element lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional materials are used in the hole transport region, then the light-emitting element can operate, but the emission efficiency is insufficient and the element lifespan is short
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of hole transport materials through systematic variation of molecular parameters. Specifically, it explores different molecular weights, chemical compositions, and structural configurations to optimize both emission efficiency and material stability. This allows achieving high productivity (emission efficiency) while maintaining reliability (element lifespan) through carefully selected material parameters.
Solution Approach 2:
The patent employs composite materials by combining multiple hole transport materials with complementary properties in the hole transport region. This composite approach enables the material layer to simultaneously exhibit enhanced hole transporting capability (improving emission efficiency) and improved stability (extending element lifespan), resolving the contradiction between productivity and reliability.
2Productivity
If materials with enhanced hole transporting properties are developed, then emission efficiency improves, but material stability may be compromised
Solution Approach 1:
The patent utilizes parameter changes by systematically adjusting molecular parameters of hole transport materials, such as molecular weight, chemical composition ratios, and structural configurations. This enables optimization of the balance between hole transporting properties (affecting emission efficiency) and material stability, achieving both improved productivity and maintained reliability.
Solution Approach 2:
The patent applies composite materials strategy by formulating hole transport layers with multiple materials that have complementary characteristics. This composite structure allows the material to exhibit enhanced hole transporting capability for high emission efficiency while the composite nature provides improved stability and resistance to degradation.
Data Source
AI summary
A light-emitting element including a first electrode, and a second electrode arranged on the first electrode is provided. At least one functional layer is arranged between the first electrode and the second electrode and includes an amine compound represented by Formula 1.