Fluoranthene Organic Compound Electron Transport Layer
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Solution Overview
Problem
Existing organic electroluminescent devices face challenges with short luminescence lifetime and low luminous efficiency in electron transport layer materials.
Innovation Solution
An organic compound with a specific structure, including fluoranthenyl, nitrogen-containing heteroaromatic cyclic groups, and cyano-substituted aromatic groups, is used as an electron transport layer material to enhance thermal stability and electronic mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional electron transport layer materials are used in organic electroluminescent devices, then the device structure is simple and ease of manufacture is maintained, but the luminescence lifetime is short and luminous efficiency is low
Solution Approach 1:
The patent modifies the molecular structure parameters of electron transport layer materials by introducing specific functional groups (triazine, pyrimidine, pyridine rings) and substituent patterns. This changes the electronic properties including LUMO energy levels, electron mobility, and thermal stability, thereby extending luminescence lifetime and improving luminous efficiency while maintaining manufacturability through conventional synthesis routes
Solution Approach 2:
The patent designs composite molecular structures combining multiple heteroaromatic rings (triazine, pyrimidine, pyridine) with electron-transporting moieties. These composite structures synergistically provide both long luminescence lifetime through extended electron delocalization and high luminous efficiency through optimized electron-hole recombination, while the modular design facilitates ease of manufacture
2Ease of manufacture
If conventional electron transport layer materials are used, then manufacturing simplicity is maintained, but luminous efficiency is low
Solution Approach 1:
The patent optimizes key molecular parameters including HOMO-LUMO energy gap, electron affinity, and molecular packing density by incorporating specific heteroaromatic units. These parameter changes enhance radiative recombination probability and electron mobility, directly improving luminous efficiency while the synthetic pathways remain accessible through standard organic chemistry techniques
Solution Approach 2:
The patent introduces localized electron-transporting functional groups (triazine, pyrimidine, pyridine rings) at specific positions within the molecular structure. These local modifications create optimal electron injection and transport sites without requiring complete molecular redesign, thereby improving luminous efficiency while maintaining ease of manufacture through targeted functionalization
3Productivity
If electron transport layer material is optimized for high luminous efficiency, then luminous efficiency is improved, but thermal stability deteriorates
Solution Approach 1:
The patent constructs composite molecular architectures combining rigid heteroaromatic cores (triazine, pyrimidine, pyridine) with flexible linkers and aromatic substituents. The rigid cores provide thermal stability through high glass transition temperatures and structural rigidity, while the optimized electronic structure of the composite enhances luminous efficiency through improved charge transport and radiative recombination
Solution Approach 2:
The patent divides the electron transport layer material into distinct functional segments: a thermally stable heteroaromatic core (providing thermal stability) and peripheral electron-transporting groups (providing high luminous efficiency). This segmentation allows independent optimization of thermal and optoelectronic properties, resolving the contradiction between thermal stability and luminous efficiency
4Productivity
If electron transport layer material is optimized for high luminous efficiency, then luminous efficiency is improved, but device lifetime is short
Solution Approach 1:
The patent modifies molecular parameters including triplet energy level, singlet-triplet energy gap, and electron mobility to enhance radiative recombination efficiency. Simultaneously, the introduction of stable heteroaromatic rings increases molecular rigidity and thermal stability, reducing degradation pathways and extending device lifetime while maintaining high luminous efficiency
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 organic compound improves the electron transport efficiency, promotes luminous efficiency, extends the lifetime of the device, and reduces the working voltage when used in organic electroluminescent devices.
Implementation Method 1
An electron injection/transport layer is disposed in an organic electroluminescent device to turn up the luminous efficiency
Implementation Method 2
holes on the side of anode and electrons on the cathode will move towards to an luminescent layer and bind with each other to form excitons when electric field is applied on the the cathode and anode; and the excitons are in an excited state to release energy, thus emitting light to the outside
Data Source
AI summary
The present disclosure relates to an organic compound, an electronic device and an electronic apparatus using the same. The organic compound of the present disclosure has a chemical structure comprising a fluoranthene and a nitrogen-containing heteroaromatic cyclic group. The organic compound can be used as a material for a functional layer of the electronic device, so as to increase the electron mobility of the electron transport material, thereby increasing the luminous efficiency and reducing the driving voltage of the electronic device.