NOVELTY - Making (M1) coated article including low-index coating having antireflective and hydrophilic properties, involves forming silica/titania precursor comprising silica sol containing silane and/or colloidal silica and titania sol comprising titanium organometallic compound; depositing the silica-titania precursor on a glass substrate (20) to form a coating (30); and curing and/or firing the coating in an oven at 550-700 degrees C for 1-10 minutes; where sessile drop of water (80) in contact with the coating or coating layer exhibits a contact angle less than or equal to 25 degrees .    USE - For making article including low-index coating having antireflective and hydrophilic properties, useful in photovoltaic device (claimed), antifog mirrors, storefront windows, display cases, picture frames, greenhouses, other types of windows, in the context of sport and stadium lighting, and/or street and highway lighting, greenhouse glass/windows, solariums. Also used as self-cleaning of the substrate. The photovoltaic device is e.g. solar cell.    ADVANTAGE - The article has low-index coating having antireflective and hydrophilic properties which allows water to easily shed there and minimizes the amount of solar reflectance there. The coating is highly durable and/or self cleaning and used photovoltaic (PV) superstrate; reduces reflection of light from the glass substrate, by allowing more light within the solar spectrum to pass through the incident glass substrate and reach the photovoltaic semiconductor so that the solar cell is more efficient.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) making a photovoltaic device comprising photoelectric transfer film, at least one electrode, and low index coating, involving making the coated article by using the method, where the low-index and hydrophilic layer is provided on a light incident side of a front glass substrate of the photovoltaic device;    (2) photovoltaic device comprising photovoltaic film , and at least a glass substrate on a light incident side of the photovoltaic film; an antireflection and hydrophilic coating provided on the glass substrate; where the antireflection and hydrophilic coating contains at least a layer provided directly on and contacting the glass substrate, and the layer is produced by using the method; and    (3) coated article comprising glass substrate; and an antireflection and hydrophilic coating provided on the glass substrate, where the antireflection and hydrophilic coating comprises at least a layer provided directly on and contacting the glass substrate, and the layer is produced using the method.    DESCRIPTION OF DRAWING(S) - The figure shows schematic of coated article.    Glass substrate (20)    Antireflection and hydrophilic coating (30)    Sessile drop of water (80)