Additive for Coating Hydrophobic Surfaces with Halide Perovskites

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This invention discloses a method for reliably depositing lead-halide perovskite coatings onto hydrophobic surfaces by adding polymethylmethacrylate (PMMA) as a polymer additive to the perovskite precursor solution. This approach results in uniform, defect-free perovskite layers on otherwise difficult-to-coat hydrophobic substrates, which is particularly useful in the production of perovskite-based solar cells. The invention also claims perovskite solar cells manufactured by this method and the use of PMMA specifically for this purpose.

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• Manufacture of perovskite solar cells and tandem solar cells with hydrophobic hole transport layers (e.g., polyTPD, PTAA, P3HT) that previously could not be reliably coated with perovskite films.
• Production of large-area perovskite coatings for solar panels on various hydrophobic polymeric substrates, enabling scalable industrial processes.
• Potential application in other optoelectronic devices (e.g., light-emitting diodes, photodetectors) requiring perovskite films on hydrophobic surfaces.
• Adaptation to produce flexible or curved perovskite-based photovoltaic panels due to improved coating on challenging substrates.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables consistent, complete coverage of hydrophobic surfaces with perovskite films, reducing defects such as pinholes and incomplete areas.
• Improves the yield and quality of perovskite-based solar cell production, particularly on substrates critical for advanced device architectures (e.g., tandem cells).
• Allows use of high-performing hydrophobic hole-transport materials without compromising the deposition of perovskite layers.
• Simplifies manufacturing by reducing the need for complex surface treatments or alternative materials.
• Facilitates scalable, industrial production of perovskite devices, broadening their commercial viability and application range.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a method for producing a coating, containing one or more Pb-(II) compounds, on a hydrophobic surface by applying a precursor solution, which contains one or more Pb-(II) compounds in an organic solvent; optionally then applying an organic anti-solvent; and then annealing, characterised in that the precursor solution contains a polymer additive containing polar groups, which is PMMA. The invention also relates to a solar cell which contains a Pb-(II) perovskite layer obtained in accordance with the method according to the invention, and the use of PMMA to produce perovskite layers on hydrophobic surfaces.