2001: Holographic Film Technology Allows Skylights to Double as Solar Cells

A firm named TerraSun develops a method of using holographic film to concentrate sunlight upon solar cells. Instead of using the usual Fresnel lenses or mirrors to concentrate light, the TerraSun design bases its efficiency on the contention that holographic film allows the more selective use of sunlight, allowing light not being used for power production to pass through the transparent modules. The holographic film transfer method is well suited for use in skylights. [US Department of Energy, 2002 ]