Condensed Cyclic Compound for OLED Solution Processing
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Solution Overview
Problem
Current organic light-emitting devices face challenges in manufacturing high-quality devices using a solution process, particularly in forming a stacked structure with a thin film that maintains high solubility and viscosity suitable for solution coating, while ensuring a high-quality emission layer.
Innovation Solution
A condensed cyclic compound with a molecular weight of 400 to 10,000, including a cross-linkable group, is used to form a thin film through a solution process, allowing for the stacking of additional layers and providing a composition suitable for organic light-emitting devices, especially in a stacked structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a solution process is used to manufacture organic light-emitting devices, then manufacturing efficiency is improved, but it becomes difficult to form a high-quality thin film emission layer with appropriate solubility and viscosity
Solution Approach 1:
The patent modifies the molecular weight of the host compound to a specific range (400-10,000) and introduces cross-linkable groups with specific structural formulas. These parameter changes enable the material to achieve optimal solubility and viscosity for solution processing while maintaining thin film formation quality, thereby resolving the contradiction between manufacturing efficiency and thin film quality.
Solution Approach 2:
The patent creates a composite material system by combining the host compound with cross-linkable groups that can form cross-linked structures. This composite approach allows the material to exhibit both good solubility for solution processing and appropriate viscosity for high-quality thin film formation, thus resolving the technical contradiction.
2Stability of the object's composition
If the molecular weight of the host compound is increased to improve film integrity, then emission layer stability is improved, but solubility and viscosity become unsuitable for solution coating
Solution Approach 1:
The patent precisely controls the molecular weight parameter within the range of 400-10,000 and incorporates cross-linkable groups with specific molecular structures. This parameter optimization ensures that the compound maintains adequate solubility and viscosity for solution coating while achieving sufficient emission layer stability through cross-linking, thereby resolving the contradiction between film stability and solution processability.
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 condensed cyclic compound enables the formation of high-quality organic light-emitting devices with improved solubility and viscosity, facilitating a solution process that maintains the integrity of the emission layer, thus enhancing the manufacturing efficiency and quality of the devices.
Implementation Method 1
the condensed cyclic compound includes at least one cross-linkable group
Data Source
AI summary
Provided are a condensed cyclic compound, a composition including the same, and an organic light-emitting device including a thin film formed from the composition. The condensed cyclic compound is represented by following Formula, has a molecular weight of about 400 to about 10,000, and comprises at least one cross-linkable group: