Organic Light Emitting Device Using Specific Compounds
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Solution Overview
Problem
There is a need for improved organic light emitting devices with enhanced efficiency, reduced driving voltage, and extended lifetime, as existing technologies face limitations in material performance and stability.
Innovation Solution
The organic light emitting device incorporates a light emitting layer comprising specific compounds of Chemical Formula 1 and Chemical Formula 2, which are designed to optimize the efficiency and lifetime by adjusting the compounds included in the light emitting layer, utilizing a multilayered structure with an anode, cathode, and organic material layers for efficient hole and electron injection and recombination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic materials are used in the light emitting layer, then the device structure is simple, but the efficiency is low and lifetime is short
Solution Approach 1:
The patent employs composite organic materials in the light emitting layer, combining multiple functional components (host material, guest material, and additives) to achieve synergistic effects. This composite approach improves light emitting efficiency and device lifetime while managing the complexity through systematic material design and selection.
2Duration of action of stationary object
If conventional organic materials are used in the light emitting layer, then the manufacturing process is simple, but the driving voltage is high and lifetime is short
Solution Approach 1:
The patent optimizes the molecular structure parameters of organic materials, including substituent groups, core structures, and molecular weight, to enhance device lifetime. By systematically varying these parameters and selecting optimal combinations, the patent achieves extended device lifetime while managing material complexity through structured design approaches.
3Power
If conventional organic materials are used in the light emitting layer, then the device structure remains simple, but the efficiency is low
Solution Approach 1:
The patent applies local quality optimization by introducing specific functional groups and substituents at particular positions within the organic material molecules. This targeted modification of local molecular structures enhances light emitting efficiency without requiring complete redesign of the entire material system, thus managing complexity while improving performance.
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 improves the efficiency and reduces the driving voltage while extending the lifetime of the organic light emitting device, demonstrating superior performance compared to conventional devices.
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 disposed opposite to the anode; and one or more organic material layers disposed between the anode and cathode, the organic material layer including a light emitting layer that includes a compound of Chemical Formula 1 and a compound Chemical Formula 2:wherein: one of R21, R22, R23, and R24 is -L21-Ar1, and the remaining are hydrogen; and one of R31, R32, R33, and R34 is -L22-Ar2, and the remaining are hydrogen;excluding compounds where:R21 is -L21-Ar1 and R31 is -L22-Ar2, R22 is -L21-Ar1 and R32 is -L22-Ar2,R23 is -L21-Ar1 and R33 is -L22-Ar2, or R24 is -L21-Ar1 and R34 is -L22Ar2;L21 and L22 each is a single bond, or a substituted or unsubstituted C6-60 arylene;X2 is O or S; andAr1 is Chemical Formula 3: