Amine Compound Functional Layers for OLED Efficiency and Lifetime
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic electroluminescence displays face challenges in achieving low driving voltage, high luminous efficiency, and long service life, necessitating the development of materials that can stabilize these characteristics.
Innovation Solution
A light emitting device incorporating an amine compound represented by specific chemical structures, which is used in functional layers such as the hole transport region and electron transport region, enhancing the device's efficiency and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional organic electroluminescence display materials are used, then the device can operate, but the luminous efficiency and service life are insufficient
Solution Approach 1:
The patent modifies the chemical structure of amine compounds by changing molecular parameters such as introducing specific heteroaryl groups (dibenzofuran, dibenzothiophene, carbazole, dibenzosilole, dibenzothiophene sulfone, pyridine, pyrimidine, or triazine groups) and adjusting substituent positions to optimize both luminous efficiency and service life simultaneously
Solution Approach 2:
The invention uses composite functional layers combining the newly developed amine compound with other materials (host materials, dopants, electron transport materials) to achieve synergistic effects that improve both luminous efficiency and device stability for extended service life
2Power
If conventional materials are used, then the device structure can be maintained, but achieving low driving voltage, high luminous efficiency, and long service life simultaneously is difficult
Solution Approach 1:
The amine compound is designed to perform multiple functions simultaneously: hole transport, electron blocking, and exciton confinement, allowing a single material to address multiple performance requirements (low voltage, high efficiency, long life) without significantly increasing device structural 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 improves luminous efficiency and extends the service life of the light emitting device, addressing the limitations of existing materials.
Implementation Method 1
holes and electrons respectively injected from a first electrode and a second electrode recombine in an emission layer
Implementation Method 2
an organic electroluminescence display includes a so-called self-luminescent light emitting 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 of the emission layer emits light
Data Source
AI summary
Provided is a light emitting device including a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer may include an amine compound represented by Formula 1 below, thereby exhibiting excellent luminous efficiency and improved service life characteristics.