Organic Emission Layer Compound for Low-Voltage Bright OLEDs
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving optimal performance in terms of luminance, driving voltage, and response speed, particularly in self-emissive devices with wide viewing angles and high contrast ratios.
Innovation Solution
A light-emitting device incorporating an interlayer with an emission layer containing an organic compound represented by Formula 1, which includes specific structural components and substituents, enhances the performance by improving stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional organic compounds are used in the emission layer, then the device structure is simple, but the luminance and efficiency are insufficient
Solution Approach 1:
The patent modifies the molecular parameters of organic compounds by introducing deuterium atoms and specific substituent groups (Ar1-Ar4, L11-L14) with defined structural characteristics. These parameter changes in the compound structure lead to improved luminance and device performance while maintaining structural clarity through systematic molecular design
Solution Approach 2:
The patent employs composite organic compound structures combining multiple functional groups (carbazole groups, aromatic groups, deuterium atoms) within a single molecular framework. This composite approach creates compounds with enhanced luminance properties while the systematic structure provides clarity in understanding the material composition
2Stress or pressure
If conventional organic compounds are used in the emission layer, then the manufacturing process is simple, but the driving voltage remains high
Solution Approach 1:
The patent changes key molecular parameters including deuterium substitution and specific substituent group configurations (R11-R22, E11-E22) that optimize the electronic properties of the organic compound. These parameter modifications reduce driving voltage while the manufacturing process remains relatively simple through conventional organic synthesis techniques
3Speed
If conventional organic compounds are used in the emission layer, then the response time is slow, but the compound structure is simpler
Solution Approach 1:
The patent implements parameter changes in the organic compound structure by introducing deuterium atoms and specific aromatic group configurations (Ar1-Ar4 with defined positions). These structural parameter changes enhance carrier mobility and recombination efficiency, resulting in faster response speeds while maintaining systematic molecular design
4Reliability
If the organic compound structure is simplified, then the synthesis is easier, but the stability and efficiency decrease
Solution Approach 1:
The patent applies parameter changes by systematically introducing deuterium atoms and specific substituent groups (L11-L14, R11-R22) that enhance molecular stability through strengthened C-D bonds and optimized electronic distribution. These controlled parameter modifications improve reliability while the systematic structural approach maintains clarity in synthesis pathways
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 device achieves improved luminance, reduced driving voltage, and faster response times while maintaining wide viewing angles and high contrast ratios, with the organic compound contributing to enhanced stability and efficiency.
Implementation Method 1
Holes provided from the first electrode move toward the emission layer through the hole transport region, and electrons provided from the second electrode move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, recombine in the emission layer to produce excitons. The excitons may transition (e.g., relax) from an excited state to a ground state, thereby generating light.
Data Source
AI summary
A light-emitting device including an organic compound represented by Formula 1, and an electronic apparatus and electronic device, each including the light-emitting device are provided. The organic compound represented by Formula 1 is further provided: