摘要:
Apparatus for producing electronic signals which are representative of a detectable condition on an image-bearing surface. The apparatus includes an elongated array of distinct thin film photosensitive elements formed on a common flexible large area substrate. The elongated array of photosensitive elements are fabricated as a large area, photovoltaic structure formed of a plurality of thin film layers, including a first layer of thin film conductive material. The discrete photosensitive elements are defined by patterning of the conductive layer into shaped regions which determine the overall configuration and dimensions of each element.
摘要:
Precursor gaseous mixtures from which to glow discharge deposit wide and narrow band gap semiconductor alloy material, said material characterized by improved photoconductivity and stability and improved resistance to photodegradation. There is also specifically disclosed a method of fabricating a narrow band gap semiconductor which method does not suffer from the effects of differential depletion of the components of the precursor gaseous mixture.
摘要:
Precursor gaseous mixtures from which to glow discharge deposit wide and narrow band gap semiconductor alloy material, said material characterized by improved photoconductivity and stability and improved resistance to photodegradation. There is also specifically disclosed a method of fabricating a narrow band gap semiconductor which method does not suffer from the effects of differential depletion of the components of the precursor gaseous mixture.
摘要:
An improved photovoltaic device exhibiting increased tolerance of shorting and shunting defects includes a pattern of current flow restricting material operatively disposed so as to limit the flow of electrical current between the substrate and the current collector of the device. Also disclosed are methods for the fabrication of the improved device.
摘要:
An improved p-type semiconductor alloy film, an improved substantially intrinsic amorphous semiconductor alloy film, improved photovoltaic and photoresponsive devices incorporating such films and r.f. and microwave glow discharge methods for fabricating same. The improved semiconductor alloy films preferably include at least silicon deposited by the glow discharge of a compound containing at least silicon and a boron species that remains substantially monoatomic as it is incorporated into the silicon matrix. The p-type film is particularly stable, is characterized by a non-narrowed band gap, reduced bulk stress, improved morphology, growth and adhesion and reduced peeling and cracking. The substantially intrinsic film is characterized by substantially reduced Staebler-Wronski degradation. The method includes the novel step of introducing a boron species that does not form higher order boron hydrides or other boron polymers or oligomers in the glow discharge plasma.
摘要:
A method of and apparatus for depositing metallic oxide coatings that are highly electrically transmissive and highly electrically conductive onto a substrate. An r.f. signal is employed to develop an ionized plasma of metal and oxygen atoms, the plasma being adapted for deposition onto a large area substrate which preferably includes semiconductor layers thereon. The method and apparatus are particularly adapted for the improved deposition of transmissive and conductive coatings which include low melting point metals onto the surface of plastic, glass or metallic substrates. The deposition may be accomplished in either a continuous or batch process mode.
摘要:
Disclosed is an improved photovoltaic device design and method. The design is especially useful for large area photovoltaic devices and includes a first electrode, a semiconductor body over the first electrode, a transparent electrically conductive layer over the semiconductor body and a bus grid structure in electrical contact with the conductor layer for collecting and carrying current generated by the photovoltaic device. Structure is provided for reducing the degrading effect of a low resistance current path or short in the semiconductor body.The structure for reducing the degrading effect of a low resistance current path can be a specifically designed transparent electrically conductive layer, electrical isolation of the current carrying portions of the bus grid structure from the conductive layer, resistive connections of the current collecting fingers to the remainder of the bus grid structure, a buffered bus grid structure or a fuse-type connection or the grid or current collecting fingers which terminates when the current reaches a predetermined amount.Methods of fabricating photovoltaic devices as disclosed herein are provided.
摘要:
A method for introducing sweep gas through a baffle system adapted for use with glow discharge deposition apparatus in which successive amorphous semiconductor layers are deposited on a substrate. The deposition apparatus includes at least a pair of adjacent dedicated deposition chambers into each of which different process gases are introduced, the chambers being operatively connected by a gas gate. Inert gases are swept through the gas gate to minimize back diffusion of process gases from the chambers. The baffle system is adapted to prevent said sweep gases from entering into turbulent flow when traveling through the gas gate passageway. Further, a sufficient volume per unit time of sweep gas is introduced to insure that some sweep gas flows into the cathode region of the first chamber, thereby substantially preventing process gases and plasma from escaping from the cathode region and forming silane powder.
摘要:
Process and apparatus for producing transparent electrical conducting thin films by activated reactive evaporation. Thin films of low melting point metals and alloys, such as indium oxide and indium oxide doped with tin, are produced by physical vapor deposition. The metal or alloy is vaporized by electrical resistance heating in a vacuum chamber, oxygen and an inert gas such as argon are introduced into the chamber, and vapor and gas are ionized by a beam of low energy electrons in a reaction zone between the resistance heater and the substrate. There is a reaction between the ionized oxygen and the metal vapor resulting in the metal oxide which deposits on the substrate as a thin film which is ready for use without requiring post deposition heat treatment.
摘要:
A composite laminate specifically adapted to protect the light incident surface of a photovoltaic module from cuts which could create a short circuit includes a plurality of stacked layer pairs. The first layer of each pair is a glass fiber material and the second layer is a thermoplastic. The layers are disposed in a mutually interpenetrating relationship and topped with a thin transparent protective layer, such as a layer of a fluoropolymer. this combination of layer pairs has been demonstrated to provide sufficient protection to meet Underwriters Laboratories specifications (UL 1703 Section 23. Cut Test) for flat plate photovoltaic modules and panels.