Heterocyclic Compound for OLED Driving Voltage Reduction
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Solution Overview
Problem
There is a continuous demand for developing new materials for organic light emitting devices that enhance efficiency and lifespan while maintaining low driving voltage, as existing heterocyclic compounds may not fully address these requirements.
Innovation Solution
A novel heterocyclic compound represented by Chemical Formula 1 is introduced, which can be used in various organic material layers of an organic light emitting device, such as hole injection, hole transport, light emission, electron transport, or electron injection layers, improving efficiency and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing heterocyclic compounds are used in organic light emitting devices, then the device can operate, but the efficiency and lifespan are insufficient
Solution Approach 1:
The patent modifies the chemical structure of heterocyclic compounds by changing parameters such as introducing specific substituents (e.g., electron-withdrawing or electron-donating groups), adjusting molecular weight, and optimizing functional group arrangements. These parameter changes in the compound structure directly improve both the efficiency and lifespan of OLEDs by enhancing charge transport properties and material stability.
Solution Approach 2:
The patent develops composite organic material systems by combining the novel heterocyclic compound with other functional materials in multilayer structures. This includes integrating the compound into hole injection layers, hole transport layers, electron transport layers, and electron injection layers, creating composite systems that synergistically improve device performance, efficiency, and operational lifetime.
2Use of energy by moving object
If existing heterocyclic compounds are used, then the device structure can be maintained, but driving voltage remains high
Solution Approach 1:
The patent optimizes the molecular parameters of heterocyclic compounds, including adjusting HOMO/LUMO energy levels, molecular planarity, and charge mobility characteristics. These parameter optimizations enable lower driving voltages by improving charge injection and transport efficiency, while the core heterocyclic structure is maintained to avoid excessive complexity.
3Productivity
If new heterocyclic compounds are developed to improve efficiency, then performance increases, but material complexity increases
Solution Approach 1:
The patent introduces functional substituents at specific local positions on the heterocyclic core structure rather than uniformly modifying the entire molecule. This local quality approach allows optimization of specific properties (e.g., charge transport, stability) while maintaining the simplicity of the core structure, thereby improving efficiency without proportionally increasing overall material complexity.
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 compound improves the efficiency and lifespan of organic light emitting devices by reducing driving voltage and enhancing the performance of these layers, as demonstrated in experimental examples.
Implementation Method 1
The organic light emitting phenomenon refers to a phenomenon where electric energy is converted into light energy by using an organic material... when the injected holes and the electrons meet each other, an exciton is formed, and light is emitted when the exciton falls to a ground state again
Data Source
Figure 1~2
AI summary
The present disclosure provides a novel heterocyclic compound and an organic light emitting device comprising the same.