Abstract: A process for preparing a self-cleaning coating on a substrate such as glass comprises providing a coating composition, adding to the coating composition nanocrystals of a photoactive material, and applying the mixture of coating composition and photoactive material to a surface of a substrate at an elevated temperature, to deposit a self-cleaning coating on the surface of the substrate. A solar thermal device comprises a solar energy conversion device, including a transparent substrate, and a self-cleaning coating adhered to a surface of the substrate.

Abstract: A method and apparatus for depositing a homogeneous pyrolytic coating on substrates. These coatings would include insulator, metal and semiconductor films on a glass substrate. The apparatus controls the size and distribution of the spray droplets to improve the uniformity of the coatings.