OLED Organic Compound for Charge Transport and Low Driving Voltage
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Solution Overview
Problem
There is a continuous need for developing new materials for organic light emitting devices to improve efficiency, reduce driving voltage, and extend service life.
Innovation Solution
A compound represented by Formula 1, where the position No. 3 of dibenzofuran is bonded to anthracene with an aryl group on naphthalene, facilitating excellent hole and electron transport, and allowing for adjustment of film morphology and intermolecular distance through various aryl group substitutions, is used in the organic light emitting device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic materials are used in the organic light emitting device, then the device structure is simple, but the efficiency is low and service life is short
Solution Approach 1:
The patent employs composite organic materials comprising multiple functional layers including hole injection layer, hole transport layer, light emitting layer, electron transport layer, and electron injection layer. Each layer is composed of specifically designed organic compounds with complementary properties, creating a composite material system that achieves high efficiency and long service life while managing the complexity through systematic material integration
Solution Approach 2:
The patent applies local quality by optimizing each organic material layer with specific compounds tailored to their functional requirements. For example, the hole transport layer uses compounds with high hole mobility, while the electron transport layer uses compounds with high electron mobility. This localized optimization of material properties in different regions of the device enables overall performance improvement without requiring complete redesign of the entire system
2Power
If conventional organic materials are used, then the manufacturing process is simple, but the driving voltage is high
Solution Approach 1:
The patent reduces driving voltage by carefully selecting organic materials with optimized energy level parameters. The HOMO and LUMO levels of each layer are specifically chosen to create favorable energy gradients for charge injection and transport. By changing these material parameters, the device achieves lower operating voltage while the multi-step synthesis processes for these optimized materials represent the trade-off in manufacturing complexity
3Reliability
If the organic material layer uses a multi-layered structure, then the device efficiency and stability are improved, but the device complexity increases
Solution Approach 1:
The patent divides the organic material layer into multiple functional segments or sub-layers, each with a specific role in the charge transport and light emission process. This segmentation allows each layer to be optimized independently for its specific function, improving overall device stability and efficiency. The modular nature of this segmented structure also facilitates systematic optimization and troubleshooting, managing the complexity through functional decomposition
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 enhances the efficiency, reduces driving voltage, and extends the service life of the organic light emitting device by enabling effective hole and electron transport while maintaining thermal stability and amorphous characteristics.
Implementation Method 1
the position No. 3 of dibenzofuran is bonded to anthracene with an aryl group on naphthalene, facilitating excellent hole and electron transport
Implementation Method 2
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 relates to a compound represented by the following Formula 1 and an organic light emitting device including the same. The compound is used as a material for an organic material layer of the organic light emitting device.