Solar Cell Research, Ultrafast Laser
Spectroscopic study of semiconductor materials used for solar cells with an apparatus assembled at NREL from components of many suppliers. An ultrafast laser measures the azimuthal dependence of second-harmonic generation in a spontaneously ordered GaInP thin film. Atomic ordering, a form of bandgap engineering used at the National Renewable Energy Laboratory's Basic Sciences Center, results in a change to the crystal symmetry of the material. This is revealed in the second-order nonlinear susceptibility, which can identify crystal directions that are isotropic to linear measurements. Spectroscopic laser (red beam) being used to measure properties of a semiconductor thin film used in solar cells. Solar cells use semiconductors to convert the energy in sunlight into electrical energy. The semiconductor thin film being investigated here, consists of a combination of the elements gallium, indium and phosphorus (GaInP0.
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Photo credit: © Photo Researchers / Alamy / Afripics
License: Licensed
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