Abstract: The present disclosure relates to a device that includes an irregular network of interconnected ridges in physical contact with a planar substrate and a perovskite layer, where the planar substrate include a support layer and a first charge selective contact layer, the first charge selective contact layer is positioned between the support layer and the interconnected ridges, each ridge includes a second charge selective contact layer and an insulating layer, the insulating layer is positioned between the first charge selective contact layer and the second charge selective contact layer, and the perovskite layer substantially covers the plurality of interconnected ridges and the underlying planar substrate.

Abstract: A composite foam article is disclosed herein. The composite foam article comprises a polyurethane foam core presenting a first surface and a second surface facing opposite the first surface. A first skin is disposed on the first surface and a second skin is disposed on the second surface. The polyurethane foam core has a density of 15-80 kg/m3. The first and second skins comprise a plurality of fibers and a polymeric binder. The composite foam article has a weight per unit area of 500-1000 g/m2 and a strength of greater than 17 N at a post-compression thickness of greater than 2 mm when tested in according with SAE J949 at 23° C.

Abstract: A rotary sliding vane fluid pump having an open rotor and radially extended arms forming slots that support the radially extending vanes. The relative position of the vanes and the inlet and discharge ports provide sealing by the vanes to the pump housing whereas the surface of the rotor does not seal to the pump housing so that radial rotor clearance is not critical. The rotor can be manufactured and assembled at lower cost. The rotor shape uses a minimum of material so that it is lower in weight and gives good pressure loading of the vanes. The open rotor is without closed voids to allow quick draining of the pump.