METHOD FOR OBTAINING A CONDUCTIVE COATING BASED ON CARBON NANOTUBES Russian patent published in 2022 - IPC H01L51/48 C01B32/158 B82B3/00 

FIELD: nanotechnology.

SUBSTANCE: invention can be used to form a homogeneous layer of carbon nanotubes (CNTs) on substrates of various materials, including on top of thin polymer layers; can be used as an upper or lower electrode (including transparent) in the formation of structures of optoelectronics and solar cells. A method for obtaining a CNT-based coating by aerosol spraying of a dispersion of functionalized CNTs with a concentration from 0.02 to 0.2 mg/ml is proposed, characterized in that simultaneously with the formation of an aerosol stream from the CNT dispersion, at a flow rate of no more than 0.02 ml/cm² per minute, a gas stream is formed over the substrate, with a flow rate exceeding the dispersion flow rate by no less than 4 orders of magnitude, while the application is carried out at a substrate temperature from 70°C to no more than the boiling point of the most volatile component of the solvent, moreover, for the preparation of CNT dispersion, one of the following solvents or a mixture of them is used as the main solvent: propylene glycol, diacetone alcohol; with the addition of an additive representing one of the following solvents: 1-hexanol, propylene glycol monomethyl ether acetate (PGMEA) or a mixture thereof, and the content of the additive as a whole relative to the main solvent should be from 1:20 to no more than 3:4, and PGMEA no more than 3:4, and 1-hexanol no more than 1:4 relative to the main solvent. Post-treatment procedures for the removal of residual solvent are proposed.

EFFECT: method makes it possible to reduce the consumption of CNT dispersion while providing improved electrical conductivity in comparison with the use of N-methyl-pyrrolidone as the main solvent.

7 cl, 2 dwg