Triazine Compounds with Bulky Groups for OLEDs
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Solution Overview
Problem
There is a need for organic semiconductor materials and layers with improved electron mobility and electrochemical stability to enhance the performance of organic electronic devices, such as OLEDs, particularly for increased lifetime at higher current density and efficiency while maintaining low operating voltage and power consumption.
Innovation Solution
The development of triazine compounds with specific structural features, such as those represented by formula 1, which are used as a matrix material in organic semiconductor layers to increase charge mobility and stability, thereby improving luminance efficiency, voltage characteristics, and lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconductor materials are used, then device structure is simple, but electron mobility is low and electrochemical stability is insufficient
Solution Approach 1:
The patent employs composite molecular structures combining triazine core units with various aromatic substituents (carbazole, triphenylamine, fluorene groups) to create organic semiconductor materials that achieve both high electron mobility and electrochemical stability. The composite nature of these molecules allows integration of electron-transporting triazine cores with stabilizing aromatic moieties, resolving the contradiction between simplicity and performance.
Solution Approach 2:
The patent introduces specific functional groups at particular positions of the triazine core structure to locally enhance electron mobility while maintaining overall molecular stability. For example, substituting carbazole or triphenylamine groups at specific positions of the triazine ring provides localized electron transport pathways without compromising the global structural stability of the molecule.
2Duration of action of moving object
If conventional organic materials are used, then manufacturing is simple, but lifetime at higher current density is short
Solution Approach 1:
The patent segments the organic semiconductor material into modular components: a triazine core unit providing electron transport capability, and separate aromatic substituent units (carbazole, triphenylamine, fluorene) that can be independently synthesized and then coupled to the core. This segmentation allows optimization of each module's properties and simplifies the overall synthesis process despite the complexity of the final molecule.
Solution Approach 2:
The patent systematically varies molecular parameters such as the type of aromatic substituent, the number of substituents, and their positions on the triazine core to optimize device lifetime at high current density. By changing these molecular parameters, the patent achieves extended device lifetime while maintaining manageable synthesis complexity through established organic synthesis methods.
3Productivity
If conventional materials are used, then power consumption may be low, but luminance efficiency is insufficient
Solution Approach 1:
The patent employs triazine-based organic semiconductor materials that enable rapid electron transport through the device, allowing electrons to quickly reach the emission layer and recombine with holes to generate light. This 'rushing through' of electrons reduces non-radiative recombination losses and improves luminance efficiency. The high electron mobility of the triazine derivatives ensures fast charge transport, improving productivity in terms of light output per unit time.
Solution Approach 2:
The patent optimizes the LUMO energy level parameter of the organic semiconductor material by selecting appropriate triazine derivatives and substituents. This parameter change enables better energy level alignment with the emission layer, improving electron injection efficiency and reducing energy losses, thereby achieving higher luminance efficiency at acceptable power consumption levels.
4Reliability
If conventional organic materials are used, then device operation is simple, but voltage characteristics are poor
Solution Approach 1:
The patent systematically adjusts the HOMO and LUMO energy level parameters of the organic semiconductor material by selecting different triazine derivatives and aromatic substituents. This parameter optimization improves voltage characteristics by achieving better energy level matching between layers, reducing operating voltage, and improving electron injection efficiency, while the modular molecular design keeps the complexity manageable.
Data Source
AI summary
The present invention relates to a triazine compound according to formula 1: suitable for use as a layer material for electronic devices, and to an organic semiconductor layer comprising at least one compound according to formula 1, as well as to an organic electronic device comprising at least one organic semiconductor layer, and a method of manufacturing the same.