Monoamine Compound for Organic EL Electron and Hole Transport
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Solution Overview
Problem
Current organic electroluminescent devices lack a material that significantly enhances their performance in terms of electron and hole transport and recombination efficiency.
Innovation Solution
A monoamine compound with a dibenzothiophene skeleton bonded via a p-phenylene linking group, a naphthalene skeleton via a phenylene linking group, and a particular aryl group via a phenylene linking group, bonded to a center nitrogen atom, is used to improve the performance of organic electroluminescent devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional materials are used in organic EL devices, then the device structure is simple, but the electron and hole transport efficiency and recombination efficiency are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of the material - specifically introducing a dibenzothiophene skeleton bonded via p-phenylene linking groups and naphthalene skeletons via phenylene linking groups to the center nitrogen atom. This structural parameter change enables simultaneous improvement in electron transport, hole transport, and recombination efficiency without requiring complex multi-layer device architecture
Solution Approach 2:
The patent employs composite material design by combining multiple functional moieties (dibenzothiophene, naphthalene, p-phenylene linking groups, phenylene linking groups) into a single integrated molecular structure. This composite approach allows the material to exhibit multiple functions - electron transport, hole transport, and recombination promotion - within one compound, resolving the contradiction between performance enhancement and structural simplicity
2Productivity
If conventional materials are used in organic EL devices, then the manufacturing process is simple, but the recombination efficiency of electrons and holes is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the material by incorporating specific aromatic hydrocarbon structures (dibenzothiophene and naphthalene skeletons) with particular linking groups. These parameter changes optimize the material's electronic properties to enhance electron-hole recombination efficiency while maintaining a single-compound formulation that does not complicate the manufacturing process
Solution Approach 2:
The patent achieves multi-functionality by designing a single compound that simultaneously provides electron transport capability, hole transport capability, and recombination promotion. This universal material eliminates the need for multiple specialized materials or complex multi-layer structures, thereby improving recombination efficiency without increasing manufacturing complexity
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 this compound in organic electroluminescent devices results in improved device performance, specifically in electron and hole transport and recombination efficiency, leading to enhanced light emission.
Implementation Method 1
electrons from the cathode side and holes from the anode side are injected into a light emitting region
Implementation Method 2
efficiently transports electrons or holes into the light emitting region
Implementation Method 3
the injected electrons and holes are recombined in the light emitting region to generate an excited state
Implementation Method 4
which then returns to the ground state to emit light
Data Source
AI summary
A compound that further improves the performance of an organic EL device, an organic electroluminescent device having a further improved device performance, and an electronic device including the organic EL device are provided, and a compound represented by the following formula (1) (the symbols in the formula are defined in the description), an organic electroluminescent device including the compound, and an electronic device including the organic electroluminescent device are provided.