The use of hollow nanoparticles has recently gained considerable attention with applications in many field ranging from drug delivery to filtration membranes. DSM has developed a single layer nanoporous antireflective cost-effective coating which can be deposited / processed from solution on a wide variety of substrates such as glass to by-pass the costly traditional interference-type multilayer coating currently available in the market. To obtain a one-layer coating with good antireflective properties, very low refractive index materials are necessary. The optimum refractive index n for a one-layer antireflective coating is 1.23 @ 700nm. There are, however, very few low index inorganic solid materials that display a refractive index lower than 1.37, therefore the best method to realize materials with a low n, is to reduce their packing density or increase porosity.<br/>DSM managed to develop a coating technology based on silica / latex core-shell nanoparticle colloidal dispersion. The resulting antireflective coating is mechanically robust, with a transmission of 98% or higher, and shows excellent outdoor durability. Added functionalities to the anti-reflective coating for PV applications will also be discussed.

Applications of colliodal core-shell nanoparticles as precursors to porous thin film coatings in photovoltaic applications

256th National Meeting (2018)

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