TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Substrate: The substrate is glass, metal, ceramic, or polymer. The substrate comprises the rigid sheet and the rigid sheet is glass.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal ion is sodium ion, lithium ion, magnesium ion, and/or zinc ion (preferably zinc ion).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The alpha -olefin is ethylene; and the parent acid terpolymer comprises the alpha , beta -ethylenically unsaturated carboxylic acid ester (15-30 wt.%) or (17-25 wt.%); and the alpha , beta -ethylenically unsaturated carboxylic acid (7-20, preferably 8-19 wt.%). The outermost layer is abrasion-resistant layer. The outermost layer and/or a portion are in contact with the substrate. The alpha , beta -ethylenically unsaturated carboxylic acid ester is methyl acrylate, ethyl acrylate, isopropyl acrylate, and/or butyl acrylate. The alpha , beta -ethylenically unsaturated carboxylic acid is acrylic acid, and/or methacrylic acid and 10-80% of the carboxylic acids are neutralized.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The portion of the substrate is transparent, where the substrate is biaxially oriented polyester film, fluoropolymer film, and/or fluoropolymer-polyester-fluoropolymer film. The polymer is polycarbonate, acrylic, polyacrylate, cyclic polyolefin, and/or metallocene-catalyzed polystyrene. The substrate comprises at least one rigid sheet or film layer and at least one polymeric interlayer; the interlayer adheres to or is in contact with the outermost layer. The substrate comprises, in the order from the front light-receiving side to the back non-light-receiving side of the solar cell module, an incident layer, a front encapsulant layer, a solar cell layer comprising at least one electrically interconnected solar cell, a back encapsulant layer, and a backing layer; and the outermost layer is the incident layer or the backing layer. The solar cell layer comprises a second substrate having deposited on a layer of thin film solar cell; and the layer of thin film solar cell is adhered to the back encapsulant layer. The incident layer is transparent; the solar cell layer comprises a second substrate having deposited on a layer of thin film solar cell; and the layer of thin film solar cell is adhered to the front encapsulant layer. EXAMPLE - No suitable example given.