Nanotechnology to make inexpensive solar cells more efficient

For nanotech to meet the need for cheap solar cells to produce electricity, it would be very useful to increase the absorption of light by inexpensive thin-film cells, which use a layer of polycrystalline silicon only 1-2 micrometers thick instead of the more expensive 200-300 micrometer-thick crystalline silicon wafers used for conventional solar cells. An open-access review article describes how a layer of nanoparticles of different sizes, compositions, and shapes enhances the efficiency of thin-film solar cells.

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