Heterocyclic Silicon Compound Emission Layers for Blue Light Efficiency
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Solution Overview
Problem
Existing light-emitting devices face challenges in achieving high luminance, efficient energy use, and long lifespan, particularly in blue light emission, due to limitations in the materials used in the emission layer.
Innovation Solution
Incorporation of a heterocyclic compound represented by Formula 1 in the emission layer, which can include transition metal-containing compounds and delayed fluorescence compounds, enhances the performance of light-emitting devices by improving luminance, efficiency, and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional materials are used in the emission layer, then device structure is simple, but luminance and efficiency are insufficient
Solution Approach 1:
The emission layer uses a composite material system comprising a host compound and a heterocyclic silicon compound dopant. The host compound provides the structural framework while the heterocyclic silicon compound dopant (at 5-20 wt%) enhances luminescence properties, achieving high luminance through material composition rather than structural complexity
Solution Approach 2:
The patent optimizes the concentration of heterocyclic silicon compound dopant within 5-20 wt% range to achieve maximum luminance enhancement. This parameter optimization allows the emission layer to achieve high performance without requiring complex multi-layer structures or additional components
2Use of energy by moving object
If conventional materials are used in the emission layer, then energy consumption is high, but achieving high luminance is difficult
Solution Approach 1:
The heterocyclic silicon compound dopant concentration is optimized at 5-20 wt% to achieve maximum energy efficiency improvement. This specific concentration range enables efficient energy utilization in the emission layer, reducing energy consumption while maintaining high luminance output that conventional materials cannot achieve
Solution Approach 2:
The composite emission layer combining host compound and heterocyclic silicon compound creates synergistic effects that improve energy utilization efficiency. The heterocyclic silicon compound dopant enhances the energy emission characteristics of the host material, achieving high luminance with lower energy input compared to conventional single-material systems
3Duration of action of stationary object
If conventional materials are used in the emission layer, then device lifespan is limited, but material selection is restricted
Solution Approach 1:
The emission layer employs a composite system where the host compound provides structural stability and long-term operational durability, while the heterocyclic silicon compound dopant enhances performance characteristics. This composite approach extends device lifespan while maintaining flexibility in material selection, as various host-compound combinations can be paired with the heterocyclic silicon dopant
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 heterocyclic compounds in the emission layer leads to improved luminance, energy efficiency, and extended lifespan of light-emitting devices, particularly in blue light emission, while maintaining high contrast ratios and short response times.
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. These excitons transition from an excited state to a ground state to thereby generate light.
Data Source
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Figure 5~6A
AI summary
Embodiments provide a heterocyclic compound, a light-emitting device comprising the heterocyclic compound, an electronic apparatus comprising the light-emitting device, and an electronic equipment comprising the light-emitting device. The heterocyclic compound is represented by Formula 1, which is explained in the specification: