Amine Compound Hole Transport Material for OLED Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic electroluminescence display devices face challenges in achieving high light efficiency and long service life for light emitting elements, particularly in the development of materials for the hole transport region that can stabilize charge transport properties.
Innovation Solution
The use of a specific amine compound, represented by Formula 1, in the hole transport region of the light emitting element, which includes a dibenzoheterole, naphthyl, and ortho-terphenyl groups, enhances charge transport properties and stability, leading to improved luminous efficiency and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional materials are used in the hole transport region, then the device structure is simple, but the luminous efficiency and service life are insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of hole transport materials by introducing specific dibenzoheterole, naphthyl, and ortho-terphenyl groups. These parameter changes in molecular structure improve charge transport properties and material stability, directly enhancing service life and luminous efficiency without requiring complex device architecture
Solution Approach 2:
The patent employs composite material design by combining multiple functional groups (dibenzoheterole, naphthyl, ortho-terphenyl) within the hole transport material molecule. This composite molecular structure achieves synergistic effects that improve both reliability and charge transport while maintaining reasonable structural complexity
2Productivity
If conventional hole transport materials are used, then the manufacturing process is simple, but the charge transport properties are insufficient
Solution Approach 1:
The patent applies local quality by introducing specific functional groups (dibenzoheterole, naphthyl, ortho-terphenyl) at targeted positions within the molecular structure. These localized structural modifications optimize charge transport properties at critical sites without requiring complex overall material composition or device structure
3Use of energy by moving object
If stable charge transport is achieved through material development, then luminous efficiency improves, but material stability requirements increase
Solution Approach 1:
The patent implements beforehand cushioning by designing molecular structures with inherent stability features (dibenzoheterole, naphthyl, ortho-terphenyl groups) that preemptively resist degradation mechanisms. This prior structural reinforcement ensures material stability is built-in before device operation, enabling high luminous efficiency without compromising longevity
Data Source
AI summary
A light emitting element includes a first electrode, a second electrode on the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport region between the first electrode and the emission layer, wherein the hole transport region may include an amine compound represented by Formula 1: