Organic Compound for OLED Driving Voltage and Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic electronic elements face challenges in achieving high thermal stability and efficient charge balance, leading to limitations in luminous efficiency, color purity, and lifespan due to the lack of stable and efficient materials for the organic material layers.
Innovation Solution
A compound represented by a specific formula is used as a host or dopant in the light-emitting layer, optimizing energy levels and T1 values across the organic material layers to improve the efficiency, stability, and lifespan of the organic electric element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic materials are used in the organic material layer, then the element can operate, but the luminous efficiency and lifespan are limited due to poor thermal stability and inefficient charge balance
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by adjusting parameters such as substituting hydrogen atoms with fluorine atoms, changing ring structures, and modifying side chains. These parameter changes in molecular structure lead to improved thermal stability and charge balance, thereby resolving the contradiction between luminous efficiency and thermal stability
Solution Approach 2:
The patent develops composite organic materials by combining different functional units within a single molecule or through material layer combinations. The compound includes multiple functional groups (electron-transporting groups, hole-transporting groups, light-emitting groups) that work synergistically to achieve both high luminous efficiency and thermal stability
2Power
If the driving voltage is high, then the element can maintain operation, but the Joule heating causes crystallization of organic material and reduces lifespan
Solution Approach 1:
The patent changes the electrical parameters of the organic material by optimizing molecular structure to improve charge carrier mobility and balance between electrons and holes. This reduces the driving voltage required for operation and minimizes Joule heating, thereby extending element lifespan
Solution Approach 2:
The patent converts the potential harm of high driving voltage and Joule heating into benefit by designing materials that efficiently transport charges at lower voltages. The optimized organic compound reduces energy loss and heat generation, turning the challenge of power consumption into an advantage for longevity
3Device complexity
If only one light emitting material is used, then the structure is simple, but the color purity deteriorates and luminous efficiency reduces due to intermolecular interactions
Solution Approach 1:
The patent applies local quality by incorporating specific functional groups at particular positions within the organic compound molecule. Different parts of the molecule perform different functions (electron transport, hole transport, light emission) with optimized local properties, achieving high luminous efficiency without requiring complex multi-material structures
Solution Approach 2:
The patent designs a universal organic compound that performs multiple functions simultaneously: electron transport, hole transport, and light emission. This multi-functional material eliminates the need for complex multi-layer structures while maintaining high luminous efficiency and color purity
4Productivity
If efficiency is increased, then the driving voltage is lowered, but achieving optimal efficiency requires complex optimization of energy levels and material properties across multiple layers
Solution Approach 1:
The patent merges multiple functions (electron transport, hole transport, light emission) into a single organic compound, eliminating the need for complex multi-layer optimization. By combining these functions in one material, the patent simplifies the optimization process while achieving high efficiency and low driving voltage
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 significantly lowers driving voltage, enhances luminous efficiency, and extends the lifespan of the organic electric element by optimizing energy levels and interfacial properties within the organic material layers.
Implementation Method 1
excitons generated in the light emitting layer are transported to the dopant, thus emitting light with high efficiency
Implementation Method 2
the crystallization of an organic material due to Joule heating generated during operation is reduced
Data Source
AI summary
The present invention provides the compound represented by Formula 1, an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and electronic device thereof, and by comprising the compound represented by Formula 1 in the organic material layer, the driving voltage of the organic electronic device can be lowered, and the luminous efficiency and life time of the organic electronic device can be improved.