Anthracene Derivative Host Material for OLED Efficiency and Stability
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Solution Overview
Problem
Current organic light emitting devices face challenges in achieving high efficiency and stability due to the limitations of materials used in their organic material layers, which affect the overall performance and color purity of the devices.
Innovation Solution
A novel anthracene derivative is synthesized and used in the organic material layer of organic electronic devices, acting as a light emitting host, hole injecting/transporting, and electron injecting/transporting material, enhancing efficiency and stability while reducing driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in the organic material layer, then the device structure can be maintained, but the efficiency and stability of the organic electronic device are insufficient
Solution Approach 1:
The patent modifies the chemical structure of anthracene by introducing specific substituent groups (Ar1, Ar2, Ar3) at different positions of the anthracene core. This structural parameter change enhances both the stability and efficiency of the organic material, resolving the contradiction between reliability and productivity.
Solution Approach 2:
The patent creates a composite organic material by combining anthracene derivative with specific substituent groups that provide both structural stability and high efficiency performance. This composite approach allows the material to simultaneously achieve improved stability and efficiency in the organic electronic device.
2Use of energy by moving object
If conventional materials are used, then the device can operate, but the driving voltage is high and color purity is reduced
Solution Approach 1:
The patent optimizes the energy level parameters of the organic material by designing specific substituent groups on the anthracene core. This changes the HOMO-LUMO energy gap and electronic structure, resulting in lower driving voltage requirements and improved color purity through enhanced electroluminescence properties.
3Device complexity
If only one material is used as the light emitting material, then the device structure is simple, but the color purity is reduced and light emitting efficiency is lowered
Solution Approach 1:
The patent employs a host/dopant composite material system where the anthracene derivative serves as the host material and specific dopant molecules are incorporated. This composite approach enables high color purity and light emitting efficiency through energy transfer from host to dopant, while maintaining a relatively simple overall device structure.
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 anthracene derivative improves the efficiency and stability of organic electronic devices, allowing for lower driving voltage and better color purity, making them more effective and reliable.
Implementation Method 1
The organic light emitting device using the organic light emitting phenomenon has a structure usually comprising an anode, a cathode and an organic material layer interposed therebetween... when a voltage is applied between two electrodes, holes from the anode and electrons from a cathode are injected into the organic material layer, the holes and the electrons injected are combined together to form excitons. Further, when the excitons drop to a ground state, lights are emitted.
Implementation Method 2
The materials used for the organic material layer of the organic light emitting device can be classified into a light emitting material and a charge-transporting material, for example, a hole injecting material, a hole transporting material, an electron transporting material and an electron injecting material, according to their functions.
Data Source
AI summary
The present invention relates to a novel anthracene derivative and an organic electronic device using the same. The anthracene derivative can act as a hole injecting, hole transporting, electron injecting and transporting, or light emitting material in an organic light emitting device and an organic electronic device. In particular, the anthracene derivative can act as a light emitting host. The organic electronic device according to the present invention has excellent characteristics in views of efficiency, the driving voltage, and the stability.