Benzocarbazole Compound for OLED Driving Voltage Reduction
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Solution Overview
Problem
Current organic light emitting devices face challenges in efficiency and stability due to the need for improved materials that can enhance performance metrics such as driving voltage and lifetime.
Innovation Solution
A benzocarbazole-based compound is introduced, which can be used in various organic material layers of an organic light emitting device, including hole injection, hole transfer, electron blocking, light emitting, and electron injection layers, to improve efficiency and reduce driving voltage while extending the device's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in organic light emitting devices, then the device structure can be maintained, but the efficiency and lifetime properties are insufficient
Solution Approach 1:
The patent modifies the chemical structure of organic materials by introducing specific functional groups and molecular configurations to the compound, changing the material parameters to simultaneously improve efficiency and lifetime properties in the organic light emitting device
Solution Approach 2:
The patent develops composite organic material systems combining multiple compounds with complementary functions (hole injection, electron injection, light emission) to achieve synergistic effects that improve both efficiency and device lifetime beyond what single materials can provide
2Power
If conventional organic materials are used, then material compatibility is maintained, but driving voltage remains high
Solution Approach 1:
The patent optimizes the energy level parameters (HOMO/LUMO levels) and charge transport properties of the organic materials through molecular design, enabling lower driving voltage while maintaining or improving device efficiency
Solution Approach 2:
The patent designs organic compound that can perform multiple functions (hole injection, electron injection, and light emission) simultaneously, reducing the need for complex multilayer structures and lowering overall device driving voltage while maintaining efficiency
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 benzocarbazole-based compound enhances the efficiency of organic light emitting devices by reducing driving voltage and improving the lifetime of the devices, making it suitable for use in multiple organic material layers.
Implementation Method 1
holes and electrons are injected to the organic material layer from the anode and the cathode, respectively
Implementation Method 2
a hole injection layer, a hole transfer layer, a light, emitting layer, an electron transfer layer, an electron injection layer
Implementation Method 3
An organic light emission phenomenon generally refers to a phenomenon converting electrical energy to light energy using an organic material
Implementation Method 4
when the injected holes and electrons meet, excitons are formed, and light emits when these excitons fall back to the ground state
Data Source
AI summary
The present specification provides a benzocarbazole-based compound of Chemical Formula 1, and an organic light emitting device comprising the same.