Amine Emitter Material for Low-Voltage OLED Recombination
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving low driving voltage, improved efficiency, and long lifespan.
Innovation Solution
Incorporation of an amine compound represented by Formula 1, which includes specific structural components such as cyclohexyl groups and various substituents, into the interlayer of a light-emitting device to enhance carrier recombination and reduce operating voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional materials are used in light-emitting devices, then the device structure is simple, but the driving voltage is high and efficiency is low
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of materials in the light-emitting device. Specifically, it introduces amine compounds with cyclohexyl groups and adjusts molecular structures (Formula 1 with specific substituents R1-R10a) to optimize electrical properties. These structural parameter changes enable lower driving voltage and improved efficiency without fundamentally altering the device architecture.
2Productivity
If conventional materials are used in light-emitting devices, then the manufacturing process is simple, but the efficiency and lifespan are insufficient
Solution Approach 1:
The patent employs composite materials by combining amine compounds with cyclohexyl groups (Formula 1) alongside other functional materials in the light-emitting device. This composite approach integrates multiple material properties to achieve both high efficiency and extended lifespan. The specific molecular structure with customizable substituents allows optimization of both performance and manufacturability.
3Productivity
If the device operates at high efficiency, then the light output is improved, but the lifespan decreases due to increased stress
Solution Approach 1:
The patent resolves the efficiency-lifespan trade-off through parameter changes in material composition. The amine compounds with specific molecular structures (Formula 1 with cyclohexyl groups and customizable substituents) enable high efficiency operation while simultaneously providing enhanced stability and reduced degradation. This allows the device to maintain both high productivity and reliability.
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 amine compound improves the efficiency and extends the lifespan of the light-emitting device by optimizing carrier recombination and reducing the driving voltage.
Implementation Method 1
Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. These excitons transit (e.g., transition or relax) from an excited state to a ground state to thereby generate light.
Data Source
AI summary
Provided are an amine compound represented by Formula 1 and a light-emitting device including the amine compound. The light emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the light-emitting device includes an amine compound represented by Formula 1.