Polycyclic Hole Transport Material for Low-Voltage OLED Lifespan
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic electroluminescence devices face challenges in achieving high efficiency and prolonged lifespan while maintaining a low driving voltage.
Innovation Solution
Incorporation of a polycyclic compound in the hole transport region of the organic electroluminescence device, specifically designed with a substituted amine group containing a cyclic or polycyclic group, enhances the efficiency and stability of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic electroluminescence device materials are used, then the device structure is simple, but the emission efficiency and lifespan are insufficient
Solution Approach 1:
The patent employs composite materials by combining the polycyclic compound (Formula 1) with substituted amine groups (Formulae 2-1 to 2-3) to create a multifunctional hole transport material. This composite structure integrates hole transport capability with enhanced stability and efficiency properties, resolving the contradiction between emission efficiency and material complexity.
Solution Approach 2:
The patent changes the chemical parameters of the hole transport material by introducing specific polycyclic core structures (X = O or S) with substituted amine groups. These parameter changes in molecular structure lead to improved emission efficiency and device lifespan while maintaining manageable structural complexity through systematic design.
2Power
If conventional organic electroluminescence device materials are used, then the device structure is simple, but the driving voltage remains high
Solution Approach 1:
The patent uses composite materials with polycyclic cores and substituted amine groups to achieve optimized charge transport properties. This composite structure enables reduced driving voltage by improving hole injection and transport efficiency, while the systematic molecular design keeps the structural complexity manageable.
Solution Approach 2:
The patent modifies the chemical parameters of the hole transport material by introducing polycyclic structures with specific heteroatoms (O or S) and amine substituents. These parameter changes optimize the energy levels and charge transport characteristics, leading to reduced driving voltage requirements.
3Duration of action of stationary object
If conventional organic electroluminescence device materials are used, then the material structure is simple, but the device lifespan is short
Solution Approach 1:
The patent employs composite materials featuring polycyclic core structures (Formula 1) combined with substituted amine groups (Formulae 2-1 to 2-3). This composite architecture provides enhanced molecular stability and resistance to degradation, extending device lifespan while maintaining structured complexity through systematic design principles.
Solution Approach 2:
The patent changes the chemical parameters of the hole transport material by introducing polycyclic structures with heteroatoms (X = O or S) and amine substituents. These parameter changes improve the thermal and chemical stability of the material, leading to extended device lifespan while keeping the structural complexity manageable through controlled molecular design.
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 polycyclic compound improves the efficiency and extends the lifespan of the organic electroluminescence device by optimizing the hole transport properties, thereby reducing the driving voltage requirements.
Implementation Method 1
the hole transport region comprises a polycyclic compound... optimizing the hole transport properties
Data Source
Figure 1~2
Figure 3~4
AI summary
A polycyclic compound represented by Formula 1 and an organic electroluminescence device that comprises a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region, wherein the hole transport region comprises a polycyclic compound represented by Formula 1: