Organic Light Emitting Device Electron Inhibition Layer
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Solution Overview
Problem
There is a continuous need for organic light emitting devices with improved driving voltage, efficiency, and lifetime.
Innovation Solution
The organic light emitting device comprises an anode, a cathode, a light emitting layer, an electron inhibition layer, and a hole transport layer, where the light emitting layer is made of specific compounds (Chemical Formulas 1, 2, and 3) that enhance the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional organic material layers are used, then the device structure is simple, but the driving voltage is high and efficiency is low
Solution Approach 1:
The organic material layer is segmented into multiple functional sub-layers: hole injection layer, hole transport layer, light emitting layer, electron transport layer, and electron injection layer. Each layer is optimized for its specific function, allowing independent material selection and thickness control to reduce driving voltage while maintaining overall device simplicity.
Solution Approach 2:
Different materials with specific properties are selected for each layer to optimize local performance. For example, the hole injection layer uses materials with high hole mobility, the light emitting layer uses electroluminescent compounds, and the electron transport layer uses materials with high electron mobility. This local optimization reduces energy barriers and driving voltage requirements.
2Device complexity
If conventional organic material layers are used, then the device structure is simple, but efficiency is low
Solution Approach 1:
The organic material layer is divided into specialized functional layers (hole injection, hole transport, light emitting, electron transport, electron injection), allowing each layer to be optimized for its specific function. This segmentation enables high efficiency through targeted material selection while keeping the overall device structure manageable and systematic.
Solution Approach 2:
The device uses composite organic material systems where each layer employs materials with complementary properties. The combination of hole-transporting materials, electron-transporting materials, and electroluminescent compounds creates a synergistic effect that significantly improves overall device efficiency beyond what single materials could achieve.
3Ease of manufacture
If conventional organic material layers are used, then manufacturing is easier, but lifetime is short
Solution Approach 1:
The organic material layer is segmented into multiple functional layers, each optimized for specific performance characteristics including stability and lifetime. This segmentation allows independent optimization of each layer's material composition and thickness to enhance overall device lifetime while maintaining manufacturing feasibility through standardized layer-by-layer fabrication processes.
Solution Approach 2:
Different materials with enhanced stability properties are selected for critical layers. The hole injection layer, light emitting layer, and electron injection layer use materials specifically chosen for their chemical stability, resistance to degradation, and long-term operational reliability, thereby extending device lifetime without complicating the manufacturing process.
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 exhibits excellent driving voltage, efficiency, and extended lifetime characteristics compared to traditional configurations.
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, a light emitting layer between the anode and the cathode, an electron inhibition layer between the anode and the light emitting layer, and a hole transport layer between the electron inhibition layer and the anode, wherein the light emitting layer comprises a compound of the following Chemical Formula 1, a compound of the following Chemical Formula 2, and a compound of the following Chemical Formula 3 as defined in the specification:having improved driving voltage, efficiency, and lifetime.