OLED Emissive Compound Linking Structure for Low Voltage and Long Life
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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 stability.
Innovation Solution
A compound represented by Chemical Formula 1, which includes a benzo(thio)xanthine bonded to a phenanthrofuran or phenanthrothiophene structure through an intermediate linking group L1, is used in the organic material layer of the device, enhancing electron and hole transfer, thereby reducing driving voltage and improving efficiency and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in the organic light emitting device, then the device structure can be maintained, but the driving voltage remains high and the service life is limited
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of organic materials through specific molecular designs (Chemical Formulas 1-13 with defined substituents and groups). This changes the electrical and optical parameters of the material, resulting in reduced driving voltage and extended service life without altering the fundamental device structure.
Solution Approach 2:
The patent employs composite materials by combining different functional groups and substituents in the organic compound structures (Chemical Formulas 1-13). These composite molecular structures integrate electron transport, hole transport, and light emission functions, improving overall device performance with lower voltage and higher reliability.
2Productivity
If new organic materials are developed to improve efficiency, then light emitting efficiency increases, but material complexity and synthesis difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the complex organic molecule into distinct functional modules (Chemical Formulas 1-13 with defined substituents R1-R110, L1 linking groups, and X1-X2 heteroatoms). Each segment can be independently designed and synthesized, then combined to achieve high light emitting efficiency while maintaining relative ease of manufacture through modular synthesis approaches.
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 achieves low driving voltage, high light emitting efficiency, and a longer service life for the organic light emitting device.
Implementation Method 1
An organic light emission phenomenon generally refers to a phenomenon converting electrical energy to light energy using an organic material... 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 of Chemical Formula 1:where X1 and X2 are the same as or different from each other, and are each independently O or S, L1 is a direct bond, a substituted or unsubstituted arylene group or a substituted or unsubstituted divalent heterocyclic group, and the other substituents are as described in the specification; and an organic light-emitting device including the same.