Conducting Polymer Dispersion with Perfluorinated Acid
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Solution Overview
Problem
Existing aqueous electrically conducting polymer dispersions used in organic electronic devices, such as OLEDs, have low conductivity and work function, limiting their applications.
Innovation Solution
Incorporating a perfluorinated polymeric acid (PFA) into the dispersions, dissolved in high boiling solvents or mixed with water, to enhance conductivity and work function, achieving values greater than 100 S/cm and 5.1 eV respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aqueous electrically conducting polymer dispersions are used, then the device structure is simple and ease of manufacture is maintained, but the electrical conductivity and work function are low, limiting application performance
Solution Approach 1:
The patent applies composite materials by combining conducting polymer particles with perfluorinated polymeric acid in an aqueous dispersion system. This composite approach enables simultaneous achievement of high electrical conductivity (>100 S/cm) and high work function (>5.1 eV), resolving the technical contradiction between improving electrical performance and maintaining material system simplicity.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the composition ratios of conducting polymer to perfluorinated polymeric acid, controlling molecular weight parameters, and optimizing aqueous dispersion conditions. These parameter optimizations enable the system to achieve both high conductivity and high work function without requiring complex multi-layer structures.
2Reliability
If perfluorinated polymeric acid is added to enhance conductivity and work function, then electrical performance is improved, but the composition complexity and processing difficulty increase
Solution Approach 1:
The patent employs perfluorinated polymeric acid as an intermediary substance that mediates between the conducting polymer particles and the aqueous environment. This intermediary enables simultaneous enhancement of both conductivity and work function while maintaining aqueous processability, thus resolving the contradiction between improved electrical performance and ease of manufacture.
Solution Approach 2:
The patent optimizes processing parameters including the concentration of perfluorinated polymeric acid (0.1-10 wt%), molecular weight parameters, and drying conditions. These controlled parameter changes enable high-performance material formation through simple aqueous coating and drying processes, maintaining ease of manufacture while achieving superior electrical properties.
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 solution significantly improves the electrical conductivity and work function of the conducting polymers, enabling their use as high-performance anodes, photovoltaic cell coatings, and capacitor cathodes without the need for materials like ITO, while maintaining high conductivity.
Implementation Method 1
simultaneous enhancement of electrical conductivity and work-function of aqueous electrically conducting polymer dispersions made by adding a perfluorinated polymeric acid
Implementation Method 2
simultaneous enhancement of electrical conductivity and work-function of aqueous electrically conducting polymer dispersions made by adding a perfluorinated polymeric acid
Implementation Method 3
adding a perfluorinated polymeric acid dissolved in a high boiling solvent or a mixture of a high boiling solvent and water
Implementation Method 4
The conducting polymers are made by oxidative polymerization of a conjugated monomer and a non-fluorinated polymeric acid in water
Data Source
AI summary
Provided are compositions having high conductivity and high work-function. The compositions comprise an aqueous dispersion or solution of an electrically conducting polymer and a perfluorinated polymeric acid. The conductive polymers may be made from conjugated monomers or comonomers and a non-fluorinated polymeric acid, and the perfluorinated polymeric acides may be derived from perfluoroolefins having perfluoro-ether-sulfonic acid side chains. Devices embodying such compositions are also provided.