Method for Producing Doped Organic Nanoparticles, Method for Producing a Functional Layer, Functional Layer, and Organic Semiconductor Device

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This patent describes a method to produce doped organic nanoparticles by dissolving a semiconducting polymer in a solvent, adding a dopant, allowing strong interactions to form pre-assembled structures, and then precipitating nanoparticles by injecting the solution into an alcohol-based antisolvent. The resulting doped nanoparticles can be used to create functional layers in organic semiconductor devices, such as improved hole or electron transport layers. These functional layers can be precisely tailored in conductivity and energy level by adjusting the materials and process parameters, enabling better performance and compatibility with various organic electronic applications.

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• Hole transport layers in organic solar cells (including inverted architectures) to enhance efficiency and stability.
• Functional layers in organic light-emitting diodes (OLEDs) for improved charge transport.
• Intermediate layers in printed electronic devices such as organic transistors, sensors, and resistors.
• Carrier transport layers in photodetectors and X-ray detectors.
• Printed components in thermoelectric devices.
• Flexible electronics including artificial skin and medical implants.
• Supercapacitors and other printed energy storage solutions.

BenefitsContent extracted from patent full text and abstract with AI.

• Facile and scalable production process enables widespread fabrication of functional electronic layers.
• Highly tunable conductivity and work function allows precise adaptation to different device architectures and materials.
• Alcohol-based nanoparticle dispersions can be deposited on a wide range of substrates, including other organic layers, without dissolving them.
• Improves device efficiency and stability, especially in organic solar cells, compared to traditional PEDOT:PSS layers.
• Enables solution-processing techniques such as inkjet printing, spin coating, and doctor blading, supporting low-cost and scalable manufacturing.
• Universal applicability—different polymers and dopants can be used to tailor performance for various devices.
• Improved environmental and chemical stability of the resulting devices thanks to optimized interfaces and reduced material degradation.

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Patent Abstract

The invention refers to a method for producing doped organic nanoparticles. The method comprises the following steps, in particular in the following order:a) dissolving a semiconducting polymer in a solvent to form a solution,b) adding a dopant with concentrations in the range of 1 to 25 wt%, preferably in the range of 5 to 15 wt%, more preferably in the range of 9 to 11 wt% to the solution,c) receiving a pre-assembled structure formed by strong interactions between the polymer-chains induced by doping,d) injecting the solution into an antisolvent, preferably into an alcohol based antisolvent,e) receiving a precipitation of doped organic nanoparticles as a (colloidal) dispersion, wherein the doped organic nanoparticles are formed by the pre-assembled structure encapsulating the dopant.Furthermore, the invention refers to a method for producing a functional layer for an organic semiconductor device, to a functional layer, and to an organic semiconductor device comprising the functional layer.