Abstract: Compositions used in, and methods for, fabricating a rear-passivated silicon solar cell are described. A novel method of opening the back surface for contacting the silicon with a conventional aluminum paste is described. Various novel screen printable etch resists are described. First, such an etch resist can be printed on the rear of a rear-passivated solar cell wafer. The passivation layer can then be removed using a wet etch, and next the etch resist layer can be removed. Further, an additional wet etch step may optionally be used to deepen the opening into the silicon and enhance the BSF (back-surface field). Aluminum paste can then be printed over the entire backside of the now etched cell. The entire cell is then fired. In exemplary embodiments of the present invention, the paste can be chosen so that it will not fire through the passivation layer.

Abstract: The present invention is directed to a silver paste for a Si solar cell comprising a high purity Bi2O3 additive and a solar cell having a silicon wafer with the silver paste on its front-side surface. The resultant cell exhibits improved efficiency.

Abstract: The present invention is directed to a silver paste for a silicon solar cell comprising an organobismuth additive and a solar cell having a silicon wafer with the silver paste on its front-side surface. The resultant cell exhibits improved efficiency.

Abstract: The composition of an electrode thick film paste used in forming electrical contacts with silicon solar cells is disclosed. The thick film paste is comprised of an electrically conductive metal, an organic vehicle system and a system of inorganic additives. The conductive metal is silver and employs a high surface area material in order to improve fine line printing. The organic system makes use of highly soluble binder materials to enable higher loading of the total resin in the paste that improves the printability and print qualities of fine lines. The improved solubility also broadens the range of thixotropes that can be used to further improve printed line properties. In the organic system, a high surface tension solvent is used to improve line quality metrics such as ‘aspect ratio’. The inorganic glass and additives include compounds of lead, tellurium and thallium that improve the electrode contact to, and light conversion efficiency of, the silicon solar cell.

Abstract: Photovoltaic cells, as well as related systems, methods, modules, and components, are disclosed.

Abstract: Compositions used in, and methods for, fabricating a rear-passivated silicon solar cell are described. A novel method of opening the back surface for contacting the silicon with a conventional aluminum paste is described. Various novel screen printable etch resists are described. First, such an etch resist can be printed on the rear of a rear-passivated solar cell wafer. The passivation layer can then be removed using a wet etch, and next the etch resist layer can be removed. Further, an additional wet etch step may optionally be used to deepen the opening into the silicon and enhance the BSF (back-surface field). Aluminum paste can then be printed over the entire backside of the now etched cell. The entire cell is then fired. In exemplary embodiments of the present invention, the paste can be chosen so that it will not fire through the passivation layer.

Abstract: This disclosure relates to a photovoltaic cell containing first and second electrodes, a photoactive layer between the first and second electrodes, and a hole transport layer between the first electrode and the photoactive layer. The hole transport layer consists of an ionic copolymer.

Abstract: Patterned photovoltaic cells, as well as related components and methods, are disclosed.

Abstract: Solid state dye sensitized photovoltaic cells, as well as related components, systems, and methods, are disclosed.

Abstract: Organic photovoltaic cells, as well as related components, photovoltaic systems, and methods, are disclosed.

Abstract: Patterned photovoltaic cells, as well as related components and methods, are disclosed.

Abstract: Patterned photovoltaic cells, as well as related components and methods, are disclosed.

Abstract: Photovoltaic cells, as well as related systems, methods, modules, and components, are disclosed.

Abstract: Co-sensitizers that co-adsorb with a sensitizing dye to the surface of an interconnected semiconductor oxide nanoparticle material increase the efficiency of photovoltaic cells by improving their charge transfer efficiency and reducing the back transfer of electrons from the interconnected semiconductor oxide nanoparticle material to the sensitizing dye.

Abstract: A method of making a photovoltaic cell includes contacting a cross-linking agent with semiconductor particles, and incorporating the semiconductor particles into the photovoltaic cell.

Abstract: Polymer catalysts for photovoltaic cells, as well as related compositions and methods, are disclosed.

Abstract: Patterned photovoltaic cells, as well as related components and methods, are disclosed.

Abstract: Polymer catalysts for photovoltaic cells, as well as related compositions and methods, are disclosed.

Abstract: A method of making a photovoltaic cell includes contacting a cross-linking agent with semiconductor particles, and incorporating the semiconductor particles into the photovoltaic cell.

Abstract: Co-sensitizers that co-adsorb with a sensitizing dye to the surface of an interconnected semiconductor oxide nanoparticle material increase the efficiency of photovoltaic cells by improving their charge transfer efficiency and reducing the back transfer of electrons from the interconnected semiconductor oxide nanoparticle material to the sensitizing dye.