Pyrimidine Organic Compound for Light-Emitting Element Reliability
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Solution Overview
Problem
Existing light-emitting elements face challenges in improving reliability, particularly in the selection of organic compounds for the EL layer, which affects the stability and efficiency of the light-emitting element.
Innovation Solution
The development of novel organic compounds with a condensed ring structure including a pyrimidine ring, which are represented by General Formulae (G1) to (G5), providing a bipolar property that enhances the reliability and efficiency of light-emitting elements when used as host materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic compounds are used in the EL layer, then the light-emitting element can be manufactured with standard materials, but the reliability and stability of the light-emitting element is insufficient
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by introducing specific ring structures (pyrimidine ring with formulas G1-G5) to change the electronic and physical parameters of the host material, thereby improving reliability while maintaining manufacturability
Solution Approach 2:
The invention creates composite organic compound structures combining specific ring systems (pyrimidine with formulas G1-G5) to achieve enhanced reliability and stability properties that individual compounds cannot provide alone
2Ease of manufacture
If the organic compound structure is simplified for ease of manufacture, then manufacturing becomes easier, but the stability against excitons and electrical resistance to electrons deteriorates
Solution Approach 1:
The patent optimizes molecular parameters by selecting specific ring configurations and substituent positions in formulas G1-G5 to achieve the right balance between manufacturability and performance, ensuring both ease of synthesis and enhanced stability
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 use of these novel organic compounds leads to improved reliability and emission efficiency of light-emitting elements, with enhanced stability against excitons and increased electrical resistance to electrons, thereby extending the lifespan and performance of the light-emitting devices.
Implementation Method 1
voltage application between a pair of electrodes causes, in an EL layer, recombination of electrons and holes injected from the electrodes, which brings a light-emitting substance (organic compound) contained in the EL layer into an excited state. Light is emitted when the light-emitting substance returns to the ground state from the excited state.
Implementation Method 2
Light emission from a singlet excited state is referred to as fluorescence
Implementation Method 3
Light emission from a triplet excited state is referred to as phosphorescence
Data Source
AI summary
A novel organic compound is provided. That is, a novel organic compound that is effective in improving reliability of a light-emitting element is provided. The organic compound includes a condensed ring including a pyrimidine ring and is represented by General Formula (G1). In General Formula (G1), A represents a group having 6 to 100 carbon atoms and includes at least one of an aromatic ring and a heteroaromatic ring. The aromatic ring and the heteroaromatic ring may each include a substituent. Furthermore, Q represents oxygen or sulfur. A ring X represents a substituted or unsubstituted naphthalene ring or a substituted or unsubstituted phenanthrene ring.