United States of America As Represented by the Secretary of the Air Force

James R Deneault

Michael F Durstock

Christopher E Tabor

Santanu Bag

A method for aerosol-jet printing a layered perovskite structure by applying a PEDOT:PSS layer to a substrate; applying a layer of lead iodide (PbI) to the PEDOT:PSS layer; and applying an aerosol mist of methylammonium iodide (CHNHI) atop the PbIlayer with an aerosol-jet nozzle to form a CHNHPbIperovskite film layer. The substrate may be an ITO glass substrate, and the PEDOT:PSS layer may be applied by a process selected from spin-coating, inkjet-printing, slot-die-coating, aerosol-jet printing, physical vapor deposition, chemical vapor deposition, and electrochemical deposition. The PbIlayer may be applied by a process selected from spin-coating, aerosol-jet printing, inkjet-printing, slot-die-coating, physical vapor deposition, chemical vapor deposition, and electrochemical deposition, and the PbIfor application to the PEDOT:PSS layer may be in a solution of DMF, DMSO, &#x3b3;-butyrolactone, or a combination thereof.

Defect mitigation of thin-film hybrid perovskite and direct writing on a curved surface

A method for forming a conductive trace on a substrate. A metallic liquid is mixed with a solvent to produce a metallic liquid mixture. The metallic liquid mixture is stimulated to produce a colloidal suspension of discrete metallic liquid particles surrounded by the solvent. The colloidal suspension is aerosolized with a carrier gas, and passed through a nozzle to deposit the discrete metallic liquid particles onto the substrate. The deposited discrete metallic liquid particles are annealed, thereby producing the conductive trace. The conductive trace has a substantially contiguous core of the metallic liquid within a substantially non-electrically conductive solid skin that substantially bounds the liquid core.

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Kettering, OH, United States of America

James R Deneault