Organic Light Emitting Device Using Co-Deposited Host Compounds
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Solution Overview
Problem
There is a need for organic light emitting devices with improved driving voltage, efficiency, and lifespan, as existing technologies do not adequately address these performance metrics.
Innovation Solution
The organic light emitting device incorporates a light emitting layer comprising specific compounds, such as those defined by Chemical Formula 1 and Chemical Formula 2, which enhance the device's performance by optimizing the interaction of holes and electrons, leading to improved efficiency and extended lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional organic materials are used in the light emitting layer, then the device structure can be kept simple, but the driving voltage remains high and efficiency and lifespan are insufficient
Solution Approach 1:
The patent changes the chemical parameters of the organic materials by introducing specific molecular structures (Formula 1 with L, Ar1, Ar2, Ar3 groups and Formula 2 with A′, L′1, L′2, L′3, Ar′1, Ar′2 groups). These parameter changes in material composition enable simultaneous improvement of efficiency and lifespan while maintaining simple device structure.
Solution Approach 2:
The patent employs composite organic materials combining different functional groups and molecular structures in the light emitting layer. The composite nature of these materials (combining Formula 1 and Formula 2 compounds with various aryl, heteroaryl, and substituent groups) achieves enhanced performance in efficiency and lifespan without complicating the overall device structure.
2Ease of manufacture
If existing organic materials are used, then material selection is straightforward, but driving voltage is not optimized and performance metrics are inadequate
Solution Approach 1:
The patent optimizes driving voltage by changing the chemical parameters of the organic materials through specific molecular designs (Formula 1 and Formula 2). These parameter changes in material composition enable better charge transport and recombination characteristics, thereby optimizing driving voltage while maintaining ease of manufacture through systematic material selection guidelines.
3Device complexity
If traditional organic materials are employed, then the development process is simpler, but efficiency and lifespan requirements are not met
Solution Approach 1:
The patent achieves improved efficiency by changing the chemical parameters of organic materials through specific molecular structures (Formula 1 with L, Ar1, Ar2, Ar3 and Formula 2 with A′, L′1, L′2, L′3, Ar′1, Ar′2). These parameter changes enhance charge carrier mobility and recombination efficiency, improving productivity without overly complicating the development process.
Solution Approach 2:
The patent introduces specific organic compound structures as intermediaries between the electrodes and the light emission process. These intermediary materials (Formula 1 and Formula 2 compounds) facilitate efficient charge transport and energy transfer, thereby improving overall device efficiency while maintaining a manageable development approach.
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 use of these compounds in the light emitting layer results in improved driving voltage, efficiency, and lifespan of the organic light emitting device, addressing the existing limitations in the field.
Implementation Method 1
an organic light emitting phenomenon refers to a phenomenon where electric energy is converted into light energy by using an organic material
Data Source
AI summary
Provided is an organic light emitting device comprising an anode; a cathode; and a light emitting layer between the anode and the cathode, wherein the light emitting layer comprises a compound of the following Chemical Formula 1 and a compound of the following Chemical Formula 2:where A′ is a naphthalene ring fused with an adjacent ring and is unsubstituted or substituted with deuterium, and the other substituents are described in the specification. Organic light emitting devices in which a compound of Chemical Formula 1 and a compound of Chemical Formula 2 are co-deposited as a host for a light emitting layer exhibit reduced driving voltage and increased efficiency and lifespan.