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The mean distance a free electron or hole moves before recombining with another hole or electron.
Industry:Energy
A process used to apply photovoltaic semiconductor material to a substrate by a physical vapor deposition process where high-energy ions are used to bombard elemental sources of semiconductor material, which eject vapors of atoms that are then deposited in thin layers on a substrate.
Industry:Energy
An electronic device that allows current to flow in one direction only. See blocking diode and bypass diode.
Industry:Energy
A waveform that has only two states, (i.e., positive or negative). A square wave contains a large number of harmonics.
Industry:Energy
Radiation received by direct solar rays. Measured by a pyrheliometer with a solar aperture of 5.7° to transcribe the solar disc.
Industry:Energy
A type of inverter that produces square wave output. It consists of a direct current source, four switches, and the load. The switches are power semiconductors that can carry a large current and withstand a high voltage rating. The switches are turned on and off at a correct sequence, at a certain frequency.
Industry:Energy
A type of electricity transmission and distribution by which electricity flows in one direction through the conductor, usually relatively low voltage and high current. To be used for typical 120 volt or 220 volt household appliances, DC must be converted to alternating current, its opposite.
Industry:Energy
The tendency of the sunlight to electricity conversion efficiency of amorphous silicon photovoltaic devices to degrade (drop) upon initial exposure to light.
Industry:Energy
Sunlight falling directly upon a collector. Opposite of diffuse insolation.
Industry:Energy
An autonomous or hybrid photovoltaic system not connected to a grid. May or may not have storage, but most stand-alone systems require batteries or some other form of storage.
Industry:Energy
