This monograph aims to examine different types of photothermal materials, such as metallic, organic, and composites, that have been reported to generate localized heat at the air-water interface, leading to vapor production on the surface. It focusses on various factors, including photothermal efficiency, evaporation rate, and others, which influence vapor generation. By drawing useful conclusions, this book contributes to the development of cutting-edge interfacial solar vaporization systems for practical applications. Features: Presents exclusive material on Interfacial solar evaporator and photothermal materials. Discusses effective photothermal material selection. Helps calculate commercial material usage expenses in the field of photothermal based evaporation systems. Examines different types of photothermal materials, such as metallic, organic, and composites. Explores photothermal efficiency and evaporation. This book is aimed at graduate students and researchers in energy and chemical engineering, and materials science.