Abstract: A passive filter for an aerosol printing system. The passive filter includes a housing having a fluid inlet port at a first end and a fluid outlet port at a second end, the fluid inlet and outlet ports being coaxial. A chamber is disposed within the housing and has a ceiling, a base, at least one wall between the ceiling and the base, a chamber entrance in the ceiling, and a chamber exit. The chamber entrance and exit being coaxial to the fluid inlet and outlet ports. The chamber exit is disposed within chamber between the chamber entrance and the base and defining a circumferential trough about the chamber exit.

Abstract: 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.

Abstract: 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 (PbI2) to the PEDOT:PSS layer; and applying an aerosol mist of methylammonium iodide (CH3NH3I) atop the PbI2 layer with an aerosol-jet nozzle to form a CH3NH3PbI3 perovskite 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 PbI2 layer 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 PbI2 for application to the PEDOT:PSS layer may be in a solution of DMF, DMSO, ?-butyrolactone, or a combination thereof.

Abstract: 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.

Abstract: A method for aerosol jet printing a layered perovskite structure comprises applying a PEDOT:PSS layer to a substrate; applying a layer of lead iodide (PbI2) to the PEDOT:PSS layer; and applying an aerosol mist of methylammonium iodide (CH3NH3I) atop the PbI2 layer with an aerosol jet nozzle to form a CH3NH3PbI3 perovskite 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 PbI2 layer 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 PbI2 for application to the PEDOT:PSS layer may be in a solution of DMF, DMSO, ?-butyrolactone, or a combination thereof. The annealing of the PbI2 layer may be performed at about 80° C. or lower.