Fluorinated Alcohol Composition for Light Emitting Device Luminance Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The luminance life of light emitting devices using single fluorinated alcohol as a solvent for electron transport materials is not sufficient.
Innovation Solution
A composition comprising a primary fluorinated alcohol, a secondary fluorinated alcohol, and an electron injectable or transportable compound, where the secondary alcohol is present in a specific mass percentage range, and the electron compound has specific functional groups, enhancing the film formability and luminance life of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single fluorinated alcohol is used as a solvent for electron transport materials, then the device can be manufactured with a simple solvent system, but the luminance life of the light emitting device is not sufficient
Solution Approach 1:
The patent applies composite materials by combining primary fluorinated alcohol and secondary fluorinated alcohol in a mixed solvent system. This composite approach creates a synergistic effect where the primary fluorinated alcohol provides good solubility and the secondary fluorinated alcohol enhances film formability and luminance life, resolving the contradiction between simple solvent systems and device durability.
Solution Approach 2:
The patent changes the parameters of the solvent system by specifying precise compositional ratios (primary fluorinated alcohol: secondary fluorinated alcohol in ranges of 95:5 to 99.9:0.1 by mass). This parameter optimization allows the mixed solvent system to achieve both ease of manufacture and improved luminance life by controlling the relative proportions of each solvent component.
2Duration of action of stationary object
If a mixed solvent system of primary and secondary fluorinated alcohols is used, then the luminance life and film formability are improved, but the device complexity increases
Solution Approach 1:
The patent optimizes the complexity by precisely defining parameter ranges for the mixed solvent system. By specifying that the primary fluorinated alcohol content should be 95-99.9% by mass and secondary fluorinated alcohol 0.1-5% by mass, the invention transforms a complex multi-component system into a controlled binary mixture with optimized performance.
Solution Approach 2:
The patent applies local quality by assigning specific functional roles to each solvent component: primary fluorinated alcohol provides bulk solvation and basic film formation, while secondary fluorinated alcohol (at 0.01-0.75% by mass) provides localized enhancement of film formability and luminance life. This functional differentiation resolves the complexity issue by giving each component a specific purpose.
3Manufacturing precision
If the content of secondary fluorinated alcohol is increased beyond 0.75% by mass, then the film formability may improve further, but the luminance life decreases
Solution Approach 1:
The patent establishes an optimal parameter range for secondary fluorinated alcohol content (0.01-0.75% by mass) based on empirical optimization. Within this range, the secondary alcohol enhances film formability without causing adverse effects on luminance life. This parameter boundary definition resolves the contradiction by identifying the precise threshold where benefits maximize and drawbacks begin.
Solution Approach 2:
The patent applies partial action by using a small but significant amount of secondary fluorinated alcohol (0.01-0.75% by mass) rather than large quantities. This partial incorporation is sufficient to improve film formability and luminance life while avoiding the excessive action that would lead to decreased device performance. The optimized dosage achieves the maximum benefit-to-cost ratio.
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 composition significantly improves the luminance life of light emitting devices by optimizing the solvent system and electron transport properties, leading to enhanced film formability and device performance.
Implementation Method 1
a composition comprising a primary fluorinated alcohol represented by the formula (1), a secondary fluorinated alcohol represented by the formula (1') and an electron injectable compound or an electron transportable compound
Implementation Method 2
an electron injectable compound or an electron transportable compound
Data Source
Figure 1
AI summary
To provide a composition which is useful for production of a light emitting device excellent in luminance life. A composition comprising a primary fluorinated alcohol represented by the formula (1), a secondary fluorinated alcohol represented by the formula (1') and an electron injectable compound or an electron transportable compound, wherein the content of the secondary fluorinated alcohol is 0.01% by mass to 0.75% by mass with respect to the total content of the primary fluorinated alcohol and the secondary fluorinated alcohol: CnH2n-m+1FmOH (1) Cn'H2n'-m'+1Fm'OH (1') [In the formula (1), n represents an integer of 1 to 10, and m is an integer satisfying 1 ≤ m ≤ 2n+1. In the formula (1'), n' represents an integer of 3 to 10, and m' is an integer satisfying 1 ≤ m' ≤ 2n'+1.].