Abstract: An anti-reflective coating is formed integrally with a silicon solar cell by treating the cell with an acidic solution comprising a mixture of HF and H.sub.2 O.sub.2.

Abstract: A method of fabricating a photoconductive detector of increased responsivity, such as an infrared detector, from a slab of N-type, intrinsic bulk semiconductor material comprises shielding part of the detector active area between the positive and negative contacts with a material limiting photon exposure of the active area to retain a reduced detector active area sufficiently spaced from the negative contact to permit negligible loss in responsivity due to recombination of the photogenerated hole carriers at the negative contact.

Abstract: A coating composition and method for vacuum coating inorganic photoconductive material onto a suitable substrate or backing through utilization of the compositions and irradiation heating devices.

Abstract: A stripe-shaped color separation filter for use with an image pickup tube is disclosed which is covered at its one surface with a layer of transparent material such as glass or SiO.sub.2 having a surface thereof which is flat enough to be practical for use with the image pickup tube. The layer of glass or SiO.sub.2 is formed on the filter by directly applying melted materials thereon, melting down (sintering) powdered materials, chemical vapor deposition, sputtering, or vacuum deposition.

Abstract: High efficiency, low cost solar energy conversion is facilitated by using tubular photovoltaic solar cells situated at the focus of a line-generated paraboloidal reflector. Advantageously, each solar cell comprises a pair of concentric glass tubes that are hermetically sealed at the ends. A photovoltaic junction is formed over the entire inside surface of one of the concentric tubes. For example, this may comprise an inner electrically conductive film, contiguous layers of Cu.sub.2 S and CdS forming a heterojunction, and an outer film of optically transparent but electrically conductive material. The conductive films provide electrical connection to the junction via external contacts that are symmetrically disposed at the ends of the tubular cell.In other embodiments the photovoltaic junction is formed in a crystalline silicon layer that is grown in situ on one of the glass tubes. Techniques for promoting oriented semiconductor crystalline growth are disclosed.

Abstract: Disclosed is a method for repairing an electrostatographic photoreceptor comprised of a conductive substrate with a uniform layer of selenium on its surface. Scratches in the selenium layer of a depth less than its total thickness are filled with a photoconductive composite as repair material. When the combination of materials forming the composite are selected so as to provide discharge characteristics similar to those of selenium, the repaired photoreceptor will provide copies in which printout in the repaired areas is of the same quality as in the non-damaged areas.

Abstract: A niobium pentoxide (Nb.sub.2 O.sub.5) anti-reflective coating for use on a solar cell responsive to light in the short wavelength region.

Abstract: The battery is of the type including a plurality of laminar semi-conductor bodies arranged on a dielectric support in parallel relation to each other and each comprising respectively layers of two different but oppositely conducting semi-conductor material forming a photovoltaic junction, with the layer adjacent the support being of the same conducting type in all of the semi-conductor bodies, and including contact strips electrically interconnecting oppositely conducting layers of adjacent semi-conductor bodies and extending throughout the length thereof. The support has one surface thereof formed with a plurality of V-shape notches extending parallel to each other and separated by lands, and the semi-conductor bodies are applied directly to the lands. The contact strips extend in the notches between two adjacent lands and are, along the edge of one land, in electrical contact with the inner layer of the respective semi-conductor body on the one land and which is directly adjacent the support.

Abstract: Disclosed is a thin film photodetector array of resistance-variable light detectors and a method for manufacturing such an array. Electronic read-out circuitry is normally associated therewith.

Abstract: A method of applying an anti-reflective coating, particularly a metal oxide coating to a solar cell during the manufacture of such cell.