Amine Compound Hole Transport Layer OLED Driving Voltage
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Solution Overview
Problem
Current organic electroluminescence devices face challenges in achieving low driving voltage, high efficiency, and long life due to limitations in hole transport and electron transport layers, particularly in maintaining stability and charge balance.
Innovation Solution
Incorporating an amine compound represented by a specific formula into the hole transport region of the organic electroluminescence device, which includes a hole transport layer, emission layer, and electron transport region, enhancing charge transport and stability through specific molecular structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional hole transport and electron transport layers are used in organic electroluminescence devices, then the device structure is simple and easy to manufacture, but the driving voltage is high, current efficiency is low, and luminance half-life is short
Solution Approach 1:
The patent changes the chemical structure parameters of the hole transport layer by introducing specific amine compounds with defined molecular structures (Formula 1) and substituents (R1, R2, R3, Ar1, Ar2), which optimizes charge transport properties and reduces driving voltage while maintaining ease of manufacture
Solution Approach 2:
The patent uses composite material strategy by combining the amine compound of Formula 1 with other organic materials in the hole transport layer and electron transport layer to achieve synergistic effects that improve current efficiency and luminance half-life while keeping the device structure relatively simple
2Ease of manufacture
If conventional hole transport and electron transport layers are used in organic electroluminescence devices, then the device structure is simple and easy to manufacture, but current efficiency is low
Solution Approach 1:
The patent optimizes current efficiency by changing the molecular structure parameters of the amine compound in the hole transport layer, specifically the substituents R1, R2, R3, Ar1, Ar2 and their configurations, which enhance charge transport and recombination efficiency
Solution Approach 2:
The patent applies local quality principle by designing specific functional groups and substituents at particular positions in the amine compound molecule (Formula 1) to optimize hole transport and electron-hole recombination locally in the emission layer, thereby improving overall current efficiency
3Ease of manufacture
If conventional hole transport and electron transport layers are used in organic electroluminescence devices, then the device structure is simple and easy to manufacture, but luminance half-life is short
Solution Approach 1:
The patent extends luminance half-life by changing the chemical stability parameters of the amine compound through specific molecular结构设计 (Formula 1) with stable aromatic groups (R1, R2, R3, Ar1, Ar2) that resist degradation under operating conditions
Solution Approach 2:
The patent avoids using expensive and complex stable materials by designing a relatively simple amine compound structure that provides sufficient stability for extended luminance half-life, balancing ease of manufacture with improved durability
4Power
If the amine compound of Formula 1 is incorporated into the hole transport layer, then driving voltage is reduced and current efficiency is improved, but the molecular structure complexity increases
Solution Approach 1:
The patent manages molecular structure complexity by systematically varying parameters in Formula 1 (substituents R1, R2, R3, Ar1, Ar2 and their positions) to achieve optimal electrical properties without excessive structural complexity, maintaining synthetic feasibility
5Productivity
If the amine compound of Formula 1 is incorporated into the hole transport layer, then current efficiency is improved and luminance half-life is extended, but the synthesis and characterization requirements become more stringent
Solution Approach 1:
The patent addresses synthesis precision requirements by focusing modifications on specific local positions in the amine compound molecule (Formula 1) such as R1, R2, R3 substituents, which allows controlled optimization of current efficiency with manageable synthesis complexity
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 amine compound achieves a low driving voltage, high current efficiency, and extended luminance half-life, improving the overall performance of the organic electroluminescence device by optimizing hole and electron recombination and stability.
Implementation Method 1
Organic electroluminescence device and amine compound for organic electroluminescence device
Data Source
AI summary
An organic electroluminescence device includes an amine compound represented by Formula 1 below in at least one organic layer among a plurality of organic layers, and an amine compound represented by Formula 1:where R1 to R3, Ar1, Ar2, n, m, L and X are as defined in the specification.