Angle-dependent light scattering in materials with controlled diffuse solar optical properties |
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| Authors: | Jacob C Jonsson Linus Karlsson Per Nostell Gunnar A Niklasson Geoffrey B Smith |
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| Affiliation: | a Department of Materials Science, The Ångström Laboratory, Uppsala University, P.O. Box 543, SE-75121, Uppsala, Sweden;b Department of Applied Physics, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia |
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| Abstract: | Light scattering plays a prominent role in a wide range of energy-efficient materials and solar applications. Some examples are materials for daylighting, diffusely reflecting sunscreens, foils for radiative cooling and nanocrystalline solar cells. Measurements of the angular profile of light scattering are very useful for obtaining a detailed characterization of the light scattering mechanisms. We review recent theoretical results on the forward and backward light scattering profiles. Forward scattering is of major importance for novel pigmented polymeric daylighting materials. Measurements of scattering profiles are in good agreement with Mie theory. Backscattering profiles from highly diffusely reflecting paints containing titanium oxide-based pigments have also been measured. It seems that scattering from the paint surface dominates at low pigment volume fractions. Results for paints with high pigment volume fractions are interpreted in terms of coherent backscattering effects from the pigment particles. |
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| Keywords: | Light scattering Angle-dependence Daylighting |
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