Organic Electronic Device Electron Transport Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic electronic devices face challenges with high operating voltages and low power efficiency due to injection barriers between electrodes and electron transport materials, and current solutions using low work function metals are unstable, reactive, and difficult to handle.
Innovation Solution
An organic electronic device incorporating a compound with a specific arylene or heteroarylene structure as an electron transport matrix compound, which forms a homogeneous mixture and is used in transport and injection layers, providing improved charge injection and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low work function metals are used to reduce injection barriers, then charge carrier injection is improved, but device stability deteriorates due to reactivity and handling difficulty
Solution Approach 1:
The patent introduces an organic electron transport material as an intermediary layer between the electrode and the active organic layers. This intermediary material facilitates charge carrier injection while being chemically stable and easy to handle, replacing the need for reactive low work function metals. The organic material mediates the interaction between electrode and organic layers, achieving good injection without the stability problems of metal-based solutions.
2Stability of the object's composition
If conventional organic electron transport materials are used, then device stability is maintained, but charge carrier transport efficiency deteriorates
Solution Approach 1:
The patent modifies the molecular structure of organic electron transport materials by introducing specific functional groups (such as phosphine oxide, carboxylic acid, or sulfonic acid groups) to optimize electron mobility and HOMO/LUMO energy levels. These parameter changes in molecular structure enable improved charge carrier transport efficiency while maintaining the chemical stability and ease of handling inherent to organic materials.
3Reliability
If high operating voltages are used, then charge carrier injection is sufficient, but power efficiency deteriorates
Solution Approach 1:
The patent optimizes the HOMO and LUMO energy levels of the organic electron transport material to better match the electrode work function and the active layers. This energy level alignment reduces the injection barrier, enabling sufficient charge carrier injection at lower operating voltages, thereby improving power efficiency without sacrificing injection reliability.
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 device achieves reduced operating voltage and enhanced power efficiency while being air-stable and easy to manufacture, overcoming the limitations of previous technologies.
Implementation Method 1
charge transport brings holes and electrons to a recombination zone in the organic layer where a recombination of the oppositely charged charge carriers to singlet and/or triplet excitons occurs
Implementation Method 2
OLEDs are based on the principle of electroluminescence in which electron-hole pairs, so-called excitons, recombine under the emission of light
Data Source
AI summary
The present invention relates to organic electronic devices. The devices can include a first electrode, a second electrode, and a substantially organic layer. The substantially organic layer may include a lithium-containing compound, and may be arranged between the first and the second electrode. Also provided herein are organic light emitting diodes, organic solar cells, and organic field effect transistors that include the lithium-containing compound.