Heterocyclic Compound for Light-Emitting Element Reliability
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Solution Overview
Problem
Current light-emitting elements using organic compounds face challenges in achieving long lifetime and high reliability due to limitations in solubility and purity of materials, which affect the performance and durability of the devices.
Innovation Solution
A novel heterocyclic compound is developed, where a dibenzo[f,h]quinoxaline ring is bonded to a fluorene skeleton through an arylene group, enhancing solubility and allowing for high-purity synthesis, thereby improving the reliability and efficiency of light-emitting elements, devices, and appliances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic compounds are used for EL layers, then light emission can be achieved, but the lifetime and reliability of light-emitting elements are limited due to poor solubility and purity
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by introducing specific heterocyclic groups (triazine, pyrimidine, pyridine rings) and substituent patterns to optimize both solubility parameters and purity characteristics, thereby resolving the contradiction between ease of manufacture and reliability
Solution Approach 2:
The invention creates composite organic compound structures combining multiple heterocyclic rings and aromatic groups in specific configurations, achieving synergistic effects that simultaneously improve solubility, purity, and device lifetime without compromising light emission performance
2Reliability
If material purity is increased to improve reliability, then device lifetime extends, but manufacturing complexity and difficulty increase
Solution Approach 1:
The patent designs molecular structures with inherent purification advantages through strategic placement of heterocyclic groups and aromatic substituents, enabling high-purity materials to be obtained through simpler, more direct synthesis routes that reduce manufacturing complexity while ensuring device reliability
3Use of energy by moving object
If conventional organic compounds are used, then light emission is achieved, but power consumption remains high and emission efficiency is limited
Solution Approach 1:
The patent optimizes the energy levels, HOMO-LUMO gaps, and molecular orbital configurations of organic compounds through systematic modification of heterocyclic ring structures and aromatic group arrangements, achieving lower power consumption and higher emission efficiency simultaneously
Solution Approach 2:
The invention employs compounds with enhanced electron-hole recombination rates and improved charge transport properties that enable faster luminescence processes, reducing energy loss and improving overall emission efficiency while lowering operational power requirements
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 high-solubility heterocyclic compound enables the production of light-emitting elements with extended lifetime, reduced impurities, and lower power consumption, ensuring high emission efficiency and reliability in electronic appliances and lighting devices.
Implementation Method 1
a dibenzo[f,h]quinoxaline ring and a fluorene skeleton are bonded to each other through an arylene group
Implementation Method 2
when a voltage is applied between a pair of electrodes with an EL layer including a luminous body provided therebetween, electrons injected from the cathode and holes injected from the anode recombine in the light emission center of the EL layer to form molecular excitons, and energy is released and light is emitted when the molecular excitons return to the ground state
Implementation Method 3
enhancing solubility and allowing for high-purity synthesis
Data Source
AI summary
A novel heterocyclic compound is provided. A novel heterocyclic compound that can be used for a light-emitting element is provided. A novel heterocyclic compound that can improve the reliability of a light-emitting element when used for a light-emitting element is provided. A light-emitting element, a light-emitting device, an electronic appliance, or a lighting device which includes the novel heterocyclic compound and is highly reliable is provided. One embodiment of the present invention is a heterocyclic compound represented by a general formula (G0). In the general formula (G0), A represents a dibenzo[f,h]quinoxalinyl group, B represents a substituted or unsubstituted fluorenyl group, and Ar represents a substituted or unsubstituted arylene group having 6 to 25 carbon atoms.A-Ar—B (G0)