Organic Electroluminescence Device Emitter Layer Luminous Efficiency
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Solution Overview
Problem
Existing organic electroluminescence devices have insufficient luminous efficiency, as per the disclosed compounds in prior patent documents.
Innovation Solution
Incorporating a specific compound represented by formula (1) as a dopant and another compound with a specific structure represented by formula (11) in the emitting layer of the organic electroluminescence device to enhance luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional dopant materials are used in the emitting layer, then the device can be manufactured with standard materials, but the luminous efficiency is insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the dopant material by introducing a specific fused ring structure with particular substituents (formula 1), which fundamentally alters the energy levels and electronic properties to achieve high luminous efficiency. This structural parameter change resolves the contradiction by transforming the material's inherent properties rather than merely adjusting conventional parameters.
Solution Approach 2:
The patent creates a composite emitting layer system by combining the specifically structured dopant (formula 1) with a host material (formula 11), where the dopant contains a fused ring structure with specific substituents. This composite approach enables synergistic effects that dramatically improve luminous efficiency while maintaining manufacturability through defined molecular structures.
2Loss of energy
If existing dopant compounds are used, then the manufacturing process remains simple, but the luminous efficiency does not meet requirements
Solution Approach 1:
The patent achieves high luminous efficiency by fundamentally changing the structural parameters of the dopant to include a fused ring system with specific substituents (formula 1), while the manufacturing process remains straightforward through conventional organic EL device fabrication techniques using these newly designed compounds.
3Loss of energy
If standard emitting layer materials are used, then the device structure remains simple, but the luminous efficiency is insufficient
Solution Approach 1:
The patent applies local quality by designing the dopant molecule (formula 1) with a specific fused ring structure containing particular substituents at defined positions, creating localized functional regions within the emitting layer that optimize energy transfer and emission properties, thereby achieving high luminous efficiency without overall device complexity.
Solution Approach 2:
The patent forms a composite emitting layer by combining the specifically structured dopant (formula 1) with a host material (formula 11), where the dopant's fused ring structure with defined substituents creates a material system with superior luminous efficiency while maintaining a relatively simple two-component structure.
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 combination of these compounds significantly improves the luminous efficiency of the organic electroluminescence device, leading to the development of an electronic appliance with superior performance.
Implementation Method 1
When voltage is applied to an organic electroluminescence device, holes and electrons are injected into an emitting layer from an anode and a cathode, respectively. Then, thus injected holes and electrons are recombined in the emitting layer, and excitons are formed therein.
Data Source
AI summary
An organic electroluminescence device, comprising:a cathode;an anode; andan emitting layer disposed between the cathode and the anode,wherein the emitting layer includes a compound represented by the following formula (1) and a compound represented by the following formula (11),provided that at least one of Ar101 and Ar102 is a monovalent group represented by the following formula (12).