2D PRINTED COMPOSITE ELECTRICALLY CONDUCTIVE LAYER ON A SUBSTRATE Russian patent published in 2023 - IPC C01B32/194 C09D1/00 C09D11/52 B05D5/12 B82B1/00 B82Y40/00 

FIELD: electronics, textile industry and nanotechnology.

SUBSTANCE: invention can be used in the manufacture of electronic circuits, thin-film stretchable or flexible electronic devices or their components, as well as textiles with electronic components. The composite electrically conductive layer is applied to the substrate by 2D printing using an ink containing a suspension containing 1 to 3 mg/mL of graphene and an organic polymer. Graphene particles have a thickness of 2 nm or less. As an organic polymer, the suspension comprises poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) - PEDOT:PSS treated with ethylene glycol, for which a solution containing 10-20 vol.% ethylene glycol in a solution of ethyl alcohol containing 30 vol.% water, the rest of ethyl alcohol, is used. Treatment with ethylene glycol is carried out until a PEDOT:PSS content of 5⋅10^-4 to 5⋅10^-3 wt.%, in relation to the content of graphene with lateral sizes of its particles from 100 to 400 nm or until the content of PEDOT:PSS is equal to 1⋅10^-3 to 5⋅10^-1 wt. %, in relation to the content of graphene at the lateral sizes of its particles from 40 to 80 nm.

EFFECT: increasing the conductivity of the electrically conductive layer by orders of magnitude, increasing the stability of the conductivity over time and the flexibility of the electrically conductive layer.

3 cl, 6 dwg