Pyrazine-Based Semiconducting Material for Balanced OLED Charge Injection
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Solution Overview
Problem
Existing organic semiconducting devices, such as OLEDs, face challenges in achieving balanced electron and hole injection, leading to inefficiencies in performance, lifetime, and power consumption, particularly in large-size displays and high brightness applications.
Innovation Solution
A compound of formula (I) is developed, which forms the basis of a semiconducting material used in organic electronic devices, enhancing electron mobility and electrochemical stability, thereby improving device performance and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconducting materials are used in OLEDs, then device structure and basic functionality are maintained, but electron mobility and electrochemical stability are insufficient, leading to poor performance and short lifetime
Solution Approach 1:
The patent employs composite materials by combining a pyrazine core structure with multiple aromatic rings (phenyl, pyridine, triazine) and various substituents to create a sophisticated organic semiconducting material. This composite molecular structure enhances both electron mobility and electrochemical stability, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent modifies molecular parameters by adjusting the substitution patterns on the pyrazine core and varying the aromatic ring configurations to optimize electronic properties. These parameter changes enable simultaneous improvement of electron mobility and electrochemical stability, addressing the technical contradiction.
2Productivity
If organic semiconductor layer is developed to increase electron mobility, then device efficiency improves, but electrochemical stability deteriorates, reducing device lifetime
Solution Approach 1:
The invention uses composite molecular structures where the pyrazine core is combined with electron-transports aromatic systems and stabilizing substituents. This composite approach allows the material to achieve high electron mobility while maintaining electrochemical stability, eliminating the trade-off between productivity and reliability.
Solution Approach 2:
The patent applies local quality by introducing specific functional groups and substituents at particular positions on the molecular structure. The pyrazine core provides electron transport capability while specific aromatic substitutions provide electrochemical stability, allowing different parts of the molecule to fulfill different functions simultaneously.
3Use of energy by moving object
If operating voltage is reduced to lower power consumption, then energy efficiency improves, but current injection balance deteriorates, reducing device performance
Solution Approach 1:
The patent changes the electronic parameters of the organic semiconductor material by optimizing molecular orbitals and energy levels through structural modifications. This enables balanced electron and hole injection at lower operating voltages, improving energy efficiency without sacrificing device performance.
Solution Approach 2:
The composite molecular structure combines electron-donating and electron-withdrawing groups to create balanced charge transport properties. This allows simultaneous achievement of good current injection balance and low power consumption by optimizing the electronic structure of the semiconductor material.
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 and semiconducting material improve the lifetime and current efficiency of organic electronic devices, particularly in large-size displays, by balancing electron and hole injection, reducing power consumption, and extending battery life.
Implementation Method 1
development of an organic semiconductor layer being capable of increasing electron mobility and simultaneously increasing electrochemical stability
Implementation Method 2
the injection and flow of holes and electrons should be balanced, so that an OLED having the above-described structure has excellent efficiency
Data Source
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AI summary
The present invention relates to a compound. The present invention relates further to a semiconducting material comprising the compound, to an organic electronic device comprising the semiconducting material, to a display device comprising the organic electronic device, and to a process for preparing the organic electronic device.