Heterocyclic Compound for OLED Driving Voltage and Lifetime
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Solution Overview
Problem
There is a need for materials that can satisfy specific conditions such as energy levels, electrochemical stability, and thermal stability for organic light emitting devices, which are essential for improving performance, efficiency, and lifetime.
Innovation Solution
A hetero-cyclic compound is developed, which can be used as a material for various organic light emitting device layers, including hole injection, hole transport, electron transport, and light emitting layers, improving driving voltage, light efficiency, and thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic light emitting device materials are used, then the device can operate, but the performance, efficiency, and lifetime are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of organic compounds through specific heterocyclic ring systems and substituent groups. This structural modification changes key parameters such as energy levels, electrochemical stability, and thermal stability, thereby simultaneously improving device lifetime and efficiency without compromising operational performance
Solution Approach 2:
The patent employs composite materials by designing organic compounds that combine multiple functional groups and heterocyclic structures within a single molecular framework. These composite molecular structures integrate multiple functions (charge transport, light emission, stability) into one material, resolving the contradiction between reliability and productivity
2Duration of action of stationary object
If materials with high thermal stability are used, then device lifetime is extended, but driving voltage may increase
Solution Approach 1:
The patent applies local quality by designing materials with specific localized functional groups (such as electron-donating or electron-withdrawing groups) attached to the heterocyclic core. These local structural modifications allow optimization of specific properties like thermal stability or charge transport without adversely affecting other properties like driving voltage, enabling simultaneous improvement of lifetime and energy 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 hetero-cyclic compound enhances the performance of organic light emitting devices by lowering driving voltage, improving light efficiency, and extending the device's lifetime through its thermal stability.
Implementation Method 1
When a voltage is applied to an organic light emitting device having the structure, electrons and holes injected from the two electrodes combine with each other in an organic thin film to make a pair, and then, emit light while being extinguished.
Implementation Method 2
the hetero-cyclic compound may be used as a material for an organic material layer of an organic light emitting device... by the thermal stability of the compound
Data Source
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AI summary
The present application provides a hetero-cyclic compound which may significantly improve the lifetime, efficiency, electrochemical stability, and thermal stability of an organic light emitting device, and an organic light emitting device in which the hetero-cyclic compound is contained in an organic compound layer.