Organic Solvent Purification for Semiconductor Liquid Compositions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The lifetime of organic semiconductor devices, particularly organic electroluminescent devices, is not sufficiently long due to the adverse effects of halogen compounds present in the organic solvents used in the liquid composition for forming the organic layers.
Innovation Solution
A liquid composition for organic semiconductor devices is developed by reducing the concentration of halogen compounds in the organic solvent to no more than 100 ppm, specifically through distillation, which improves the coating properties and extends the device's functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If halogen compounds are present in the organic solvent used in the liquid composition, then the coating property is improved, but the lifetime of the organic semiconductor device is shortened
Solution Approach 1:
The patent changes the concentration parameter of halogen compounds in the organic solvent from conventional levels (typically several hundred ppm or higher) to a specifically controlled range of not more than 100 ppm. This parameter change resolves the contradiction by maintaining sufficient coating properties while eliminating the harmful effects that shorten device lifetime. The liquid composition achieves both good coating performance and extended device operational life through this precise concentration control.
2Reliability
If the concentration of halogen compounds in the organic solvent is reduced to not more than 100 ppm, then the device lifetime is prolonged, but the coating property may be adversely affected
Solution Approach 1:
The patent identifies and controls the halogen compound concentration parameter within a specific range (not more than 100 ppm) to simultaneously achieve both prolonged device lifetime and maintained coating properties. This parameter optimization resolves the apparent contradiction by finding the optimal concentration point where harmful effects are eliminated while beneficial coating effects are preserved.
Solution Approach 2:
The patent uses the organic solvent as an intermediary medium that delivers the liquid composition to the substrate. By carefully controlling the halogen compound concentration in this intermediary solvent, the patent ensures that the solvent maintains its coating facilitation function while preventing halogen compounds from causing device degradation. The controlled solvent acts as a benign intermediary that enables manufacturing without compromising device 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 use of this liquid composition results in organic semiconductor devices with improved quality and prolonged luminance half-life, suitable for applications such as light sources and display apparatuses.
Implementation Method 1
A liquid composition for organic semiconductor devices is developed by reducing the concentration of halogen compounds in the organic solvent to no more than 100 ppm, specifically through distillation
Implementation Method 2
A process for producing a liquid composition for an organic semiconductor device, the process comprising a step of dissolving an organic compound which is solid at 1 atm and 25° C. in an organic solvent which is liquid at 1 atm and 25° C.
Data Source
AI summary
A problem to be solved of the present invention is to provide a liquid composition for an organic semiconductor device having good coating property, wherein the lifetime of the function of an organic semiconductor device is prolonged when an organic layer is formed from the liquid composition for an organic semiconductor device, and a process for producing the liquid composition. A mean for solving the problem is a process for producing a liquid composition for an organic semiconductor device comprising a step of dissolving an organic compound which is solid at 1 atm and 25° C. in an organic solvent which is liquid at 1 atm and 25° C. and has a halogen compound concentration of not more than 100 ppm by weight.