Solar Spectrum Selective Absorbing Coatings

Solar energy , as the most important renewable energy source , has many advantages such as abundant reserves , wide distribution, cleanliness and safety. Therefore , the research on solar energy utilization technologies has important implications of enriching energy structure, reducing environmental pollution , and optimizing resource allocation. And as a note, the photo-thermal conversion is the simplest and most efficient way to achieve direct utilization of solar energy. This paper briefly introduces the significance , advantages and disadvantages of solar energy , and comprehensively analyzes the basic types , absorption mechanisms and the latest research results of selective absorbing coatings for indirect solar collectors. Finall , the existing problems , challenges and prospects for the development of spectrally selective absorbing coatings used for solar collectors are also commented.