Optimization and analysis of solar selective surfaces with continuous and multilayer profiles

摘要: Both continuous and multilayer profiles of solar selective surfaces have been analyzed optimized. The structure having the highest photothermal efficiency has two uniform absorbing layers with antireflection different refractive index materials. Interference effects were in terms optical path length sublayers their combination. phase cancellation positions for optimized are well distributed radiation range but do not occur at wavelengths above about 2.5 μm. A study electric‐field distribution these shown that sharp transition μm from low to high reflectance is due absence filling factor which can act as an effective reflecting substrate. properties structures particularly sensitive graded profile thickness variations ±20%.