Organic Compound Structure for Lower Driving Voltage in OLEDs
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Solution Overview
Problem
There is a continuous need for developing new materials for organic light emitting devices to improve their efficiency and stability, particularly in reducing driving voltage and enhancing service life.
Innovation Solution
A compound represented by Chemical Formula 1 is introduced, which can be used in the organic electronic device, comprising a specific structure with aromatic hydrocarbon rings, arylene groups, and various substituents, forming an organic material layer that lowers driving voltage and improves light efficiency and thermal stability.
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 driving voltage remains high and service life is limited
Solution Approach 1:
The patent modifies the chemical structure of organic materials by introducing specific molecular configurations (Formula 1 with defined substituent groups) to change electrical and thermal parameters, resulting in lower driving voltage and improved device stability and service life
Solution Approach 2:
The invention uses composite organic material structures combining multiple functional groups (aromatic hydrocarbon rings, hetero rings, arylene groups, and various substituents) to achieve synergistic effects that simultaneously reduce voltage requirements and enhance reliability
2Productivity
If multi-layered organic material structures are used to improve efficiency, then light emitting efficiency improves, but device complexity increases
Solution Approach 1:
The patent designs organic materials with multi-functional molecular structures that can perform multiple functions (charge transport, light emission, and stability enhancement) within a single material system, reducing the need for complex multi-layered device structures while maintaining high light emitting efficiency
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 reduces the driving voltage of organic electronic devices and enhances their light efficiency and service life due to its thermal stability, making it suitable for organic light emitting devices.
Implementation Method 1
An organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy by using an organic material
Data Source
AI summary
A compound of Chemical Formula 4 or 5:wherein: one of X1 and X2 is a direct bond, and the other is O, S, or CY1Y2, one of X3 and X4 is a direct bond, and the other is O, S, or CY3Y4, W1 to W4 are each independently N or CRa, and one or more of W1 to W4 are N, Y1 to Y4 are the same as or different from each other, and are each independently an alkyl group having 1 to 20 carbon atoms, and the other substituents are as defined in the specification; and an organic light emitting device comprising the same. The compound can lower the driving voltage, improve the light efficiency, and enhance service life characteristics of the device due to thermal stability of the compound.