Anthracene Derivative Electron Transporting Layer Drive Voltage Reduction
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Solution Overview
Problem
Organic electroluminescence devices (EL) require lower drive voltage and higher efficiency for practical use, as they currently exhibit higher drive voltage and deteriorated properties compared to inorganic light-emitting diodes, despite improvements.
Innovation Solution
An anthracene derivative is used in the electron transporting layer of organic EL devices, specifically designed to reduce drive voltage by optimizing the molecular structure and layer configuration, including the use of a phenyl group and specific substituents to enhance electron mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional organic EL device structures are used, then the device can be manufactured with existing technology, but the drive voltage remains high and efficiency is poor
Solution Approach 1:
The patent modifies the molecular structure parameters of the electron transporting layer by introducing specific anthracene derivative compounds with controlled substituents (Ar1, Ar2, Ar3, L1, L2, L3) to optimize electron mobility and reduce drive voltage while maintaining device performance
Solution Approach 2:
The patent employs composite material design by combining anthracene core structure with various aromatic hydrocarbon groups and heterocyclic groups to create electron transporting materials that simultaneously achieve low drive voltage and high efficiency
2Power
If anthracene derivatives are introduced to reduce drive voltage, then operational voltage decreases, but molecular structure complexity increases
Solution Approach 1:
The patent applies local quality modification by introducing specific functional groups (Ar1, Ar2, Ar3) at particular positions on the anthracene core structure to achieve voltage reduction without requiring complete molecular redesign
Solution Approach 2:
The patent segments the molecular structure into distinct functional components (anthracene core, linking groups L1-L3, and terminal groups Ar1-Ar3) that can be independently optimized to reduce voltage while managing structural 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 anthracene derivative reduces the drive voltage of organic EL devices, improving their efficiency and practicality by optimizing the electron transporting layer, leading to lower operational voltages and enhanced performance.
Implementation Method 1
an anthracene derivative is used in the electron transporting layer of organic EL devices, specifically designed to reduce drive voltage by optimizing the molecular structure and layer configuration
Implementation Method 2
When an electrical field is applied to the opposing electrodes of the organic EL device, electrons are injected from a cathode and holes are injected from an anode. When the injected electrons and holes are recombined in the emitting layer, excitons are formed. Energy generated when the excitons are returned from an excited state to a ground state is irradiated as light.
Data Source
AI summary
An anthracene derivative is represented by a formula (1) below,in which at least one of Ar1, Ar2, Ar3, L1, L2 and L3 is a group derived from a skeleton represented by a formula (10) below,