Nitrogen-Containing Compound for OLED Electron Transport
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Solution Overview
Problem
Current organic electroluminescence display devices face challenges in achieving high luminous efficiency and long service life due to limitations in electron transport materials, which affect the stability and performance of light emitting elements.
Innovation Solution
Incorporation of a nitrogen-containing compound represented by specific formulas in the electron transport region and emission layer of the light emitting element, enhancing electron transport properties and stability, thereby improving luminous efficiency and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electron transport materials are used in organic electroluminescence display devices, then the device structure is simple and ease of manufacture is maintained, but luminous efficiency is low and service life is short
Solution Approach 1:
The patent modifies the chemical structure of electron transport materials by introducing nitrogen-containing compounds with specific molecular formulas (Formula 1 with various substituents R1, R2, Ar, L1, L2) to change the electronic and transport properties of the material, thereby improving service life and luminous efficiency while maintaining manufacturability through defined structural parameters
Solution Approach 2:
The patent employs composite electron transport materials combining nitrogen-containing compounds (Formula 1) with other functional materials in the emission layer and electron transport region, creating a synergistic effect that enhances both service life and luminous efficiency while preserving ease of manufacture through established material combination approaches
2Productivity
If conventional electron transport materials are used, then manufacturing process is simple, but luminous efficiency is low
Solution Approach 1:
The patent optimizes luminous efficiency by changing the chemical parameters of electron transport materials, specifically incorporating nitrogen-containing compounds with controlled molecular structures (Formula 1 with defined substituents) to enhance electron transport capability and energy utilization in the emission layer
Solution Approach 2:
The nitrogen-containing compound acts as an intermediary material in the electron transport region and emission layer, facilitating efficient electron transport and energy transfer between different functional layers, thereby improving luminous efficiency without requiring complex device structure changes
3Stability of the object's composition
If conventional electron transport materials are used, then device structure remains simple, but stability is insufficient
Solution Approach 1:
The patent enhances stability by modifying the chemical composition parameters of electron transport materials, introducing nitrogen-containing compounds with specific molecular structures (Formula 1 with various Ar, L1, L2, R1, R2 groups) that provide improved chemical and operational stability in the emission layer and electron transport region
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 the nitrogen-containing compound improves the luminous efficiency and extends the service life of the light emitting element, leading to more stable and efficient organic electroluminescence display devices.
Implementation Method 1
development on materials for an electron transport region having excellent electron transport properties
Implementation Method 2
an organic electroluminescence display device is a so-called self-luminescent display device in which holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer, so that a luminescent material including an organic compound in the emission layer emits light
Data Source
AI summary
Embodiments provide a nitrogen-containing compound and a light emitting element. The light emitting element includes a first electrode, a second electrode facing the first electrode, and at least one functional layer disposed between the first electrode and the second electrode, wherein the functional layer includes the nitrogen-containing compound. The nitrogen-containing compound is represented by Formula 1, which is explained in the specification: