Heterocyclic Compound for OLED Efficiency and Lifespan
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Solution Overview
Problem
There is a continuous need for developing new materials for organic light emitting devices to improve efficiency and lifespan characteristics, particularly in the layers responsible for hole injection, transport, light emission, electron transport, and electron injection.
Innovation Solution
A hetero-cyclic compound represented by Chemical Formula 1 is used in the organic light emitting device, which can be employed as a material for various layers such as hole injection, hole transport, light emission, electron transport, or electron injection, potentially improving the device's efficiency and lifespan by optimizing the organic material layer structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in organic light emitting devices, then the device structure can be maintained, but the efficiency and lifespan characteristics are insufficient
Solution Approach 1:
The heterocyclic compound is designed to perform multiple functions across different device layers. The compound can be used in hole injection layers, hole transporting layers, light emitting layers, electron transporting layers, and electron injection layers, providing universal functionality that improves reliability across the entire device structure while maintaining versatility
Solution Approach 2:
The invention modifies molecular parameters of organic materials by introducing specific heterocyclic structures with defined chemical formulas. These parameter changes in molecular structure lead to improved efficiency and lifespan characteristics while maintaining the ability to function across multiple device layers
2Productivity
If the organic material layer structure is optimized for improved efficiency, then device performance increases, but the complexity of material selection and layer configuration increases
Solution Approach 1:
By using a single heterocyclic compound that can function across multiple layers (hole injection, hole transport, light emission, electron transport, electron injection), the invention reduces material selection complexity while maintaining optimized efficiency. One compound replaces what would traditionally require multiple different materials
Solution Approach 2:
The invention merges the functionality of multiple layer-specific materials into a single heterocyclic compound. This consolidation simplifies the overall material layer structure while achieving improved device efficiency through the compound's multifunctional properties
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 hetero-cyclic compound enhances the efficiency of the organic light emitting device by achieving low driving voltage and improving lifespan characteristics, making it suitable for use in multiple layers including hole injection, hole transport, light emission, and electron transport layers.
Implementation Method 1
holes are injected from a positive electrode into the organic material layer
Implementation Method 2
electrons are injected from a negative electrode into the organic material layer
Implementation Method 3
when the injected holes and electrons meet each other, an exciton is formed, and light is emitted when the exciton falls down again to a ground state
Data Source
AI summary
The present specification provides a hetero-cyclic compound and an organic light emitting device comprising the same.