A perfectly transparent aerogel could replace the glass in solar collectors, improving efficiency and reducing costs.
Developed by a team from MIT, the transparent silica-based aerogel would take the place of the glass panel commonly layered over the heat-absorbing material. The aerogel is applied as a liquid, and then dries quickly to leave behind a matrix made up mostly of air with very small pore spaces between the grains. The result was a layer that lets in over 95 percent of sunlight while also remaining highly insulative.
More Info about this Invention: