OLED Organic Compound Purification for Longer Driving Lifetime
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic light-emitting devices suffer from reduced driving lifetimes due to the presence of highly active anthracene compounds, which are not effectively addressed by previous technologies.
Innovation Solution
A method to produce a composition with a reduced concentration of anthracene compounds by employing chemical reactions such as Diels-Alder and oxidation reactions to selectively remove anthracene compounds, ensuring they are present at concentrations of 100 ppm or less, thereby stabilizing the organic compound layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If anthracene compounds are used as light-emitting materials, then color purity and light-emitting performance are improved, but driving lifetime is reduced due to high reactivity
Solution Approach 1:
The patent extracts and removes highly active anthracene compounds (specifically those with hydrogen at positions 9 and 10) from the organic compound layer through purification processes, while retaining the beneficial light-emitting properties of the overall composition
Solution Approach 2:
The patent changes the concentration parameter of anthracene compounds from typical levels (where color purity is optimized) to extremely low levels (100 ppm or less), thereby improving driving lifetime while maintaining acceptable color purity through careful control of this parameter
2Ease of manufacture
If coal-derived organic compounds are used, then material availability and cost are improved, but highly active substances are present that reduce device lifetime
Solution Approach 1:
The patent extracts harmful highly active substances (anthracene compounds with hydrogen at positions 9 and 10) from coal-derived organic compounds through purification processes, separating the beneficial bulk material from the harmful impurities
Solution Approach 2:
The patent identifies the highly active anthracene compounds that cause degradation and selectively removes them, converting the harmful presence of these compounds into a benefit by achieving both coal-derived material advantages and extended device lifetime through targeted purification
3Power
If highly active anthracene compounds are present in the organic compound layer, then light-emitting efficiency is maintained, but the organic compound layer stability deteriorates
Solution Approach 1:
The patent changes the concentration parameter of anthracene compounds to extremely low levels (100 ppm or less), fundamentally altering the composition parameters to achieve both stability and maintained light-emitting performance
Solution Approach 2:
The patent extracts the highly active anthracene compounds that cause instability while preserving the overall organic compound layer composition and its light-emitting functionality
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 method significantly improves the driving lifetime of organic light-emitting devices by maintaining the stability of the organic compound layer, enhancing luminance and durability.
Implementation Method 1
employing chemical reactions such as Diels-Alder and oxidation reactions to selectively remove anthracene compounds
Implementation Method 2
employing chemical reactions such as Diels-Alder and oxidation reactions to selectively remove anthracene compounds
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A composition contains an organic compound and an anthracene compound different from the organic compound, the anthracene compound having a hydrogen atom at at least one of positions 9 and 10, in which the concentration of the anthracene compound is 100 ppm or less. Additionally, a long-lived organic light-emitting device (26) includes an organic compound layer (22) containing a reduced concentration of the anthracene compound.