Conductive Polymer Doping with Non-Fluorinated Acid Polymers
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Solution Overview
Problem
Existing electrically conductive polymer compositions used in organic electronic devices, such as OLEDs, suffer from low pH levels due to water-soluble polymeric sulfonic acids, leading to decreased stress life and corrosion, and have conductivities too low for effective use as electrodes.
Innovation Solution
Development of an electrically conductive polymer composition comprising an intrinsically conductive polymer doped with a non-fluorinated acid polymer, which includes specific monomer units and can be formulated into an aqueous dispersion, enhancing compatibility and conductivity for use in buffer layers and electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If water-soluble polymeric sulfonic acids are used to dope conductive polymers, then the polymers can be prepared by polymerizing monomers in aqueous solution, but the resulting compositions have low pH levels leading to decreased stress life and corrosion
Solution Approach 1:
The patent changes the chemical parameter of the dopant from water-soluble polymeric sulfonic acids to water-insoluble polymeric sulfonic acids, which fundamentally alters the pH characteristics and stability of the conductive polymer composition while maintaining the ease of aqueous preparation
Solution Approach 2:
The patent converts the previously harmful low pH effect into a beneficial property by using water-insoluble polymeric sulfonic acids that provide high conductivity and stability without the corrosive low pH, thus transforming a harmful characteristic into a desirable one
2Ease of manufacture
If water-soluble polymeric sulfonic acids are used to dope conductive polymers, then the polymers can be prepared by polymerizing monomers in aque solution, but the resulting compositions exhibit corrosion within the device
Solution Approach 1:
The patent changes the solubility parameter of the polymeric sulfonic acid from water-soluble to water-insoluble, which eliminates the corrosion problem while preserving the ease of aqueous preparation of the conductive polymer
Solution Approach 2:
The patent eliminates corrosion by using water-insoluble polymeric sulfonic acids that provide the necessary doping function without the harmful corrosive effects associated with water-soluble variants
3Ease of manufacture
If conventional conductive polymers are used, then they can be prepared by standard polymerization methods, but their conductivities are too low for use as electrodes
Solution Approach 1:
The patent creates a composite system combining conductive polymer particles with water-insoluble polymeric sulfonic acid dopant, achieving high electrical conductivity suitable for electrode applications while maintaining ease of preparation through standard polymerization methods
Solution Approach 2:
The patent changes the conductivity parameter of the conductive polymer by using water-insoluble polymeric sulfonic acids as dopants, achieving conductivities sufficient for electrode applications while preserving ease of preparation
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 new composition improves the physical and electrical properties of conductive polymers, increasing their stress life and preventing corrosion, while providing higher conductivity suitable for electrode applications in organic electronic devices.
Implementation Method 1
an intrinsically conductive polymer doped with a non-fluorinated acid polymer
Implementation Method 2
The buffer layer is typically an electrically conducting polymer and facilitates the injection of holes from the anode into the EL material layer
Data Source
AI summary
The present invention relates to electrically conductive polymer compositions, and their use in organic electronic devices. The electrically conductive polymer compositions include an intrinsically conductive polymer having at least one monomer unit derived from Formula I:where:Q=N, CR5 X=N, CR6 Z=NH, S, O, Se, TeR1 through R4 can be H, F, Cl, C1-C24 alkyl, C2-C24 alkenyl, aryl, C1-C10 alkoxy, C1-C10 alkylseleno, C1-C10 alkylthio, C1-C10 alkylsilyl, NH2, or C1-C10 dialkylamino, where adjacent R groups can join together to form a 5- or 6-membered aliphatic or aromatic rings, with the proviso that at least one of R1 through R4 is NH2, and at least one of R1 through R6 is H, and.R5 and R6 can be H, C1-C24 alkyl, C2-C24 alkenyl, and aryl.The electrically conducting polymer is doped with a non-fluorinated acid polymer.