Solar Cells and TFT

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Solar Cells and TFT
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Solar Panel motor configuration
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Copper Indium Gallium diSelenide (CIGS)
Technology CuInxGa1-xSe2 (CIGS) thin film
photovoltaic cells are notable for their high
conversion efficiency and stable performance.
They do not suffer from the Staebler-Wronski
Effect because they do not share the same
amorphous, hydrogenated semiconductor nature as
amorphous silicon. NREL learned how to make CIS
cells reaching 17.7 efficiency in 1996 by adding
gallium and graded layers, achieving both
improved morphology (larger grains) and better
electronic properties.
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• One way efficiency has been improved is to use
  two or more layers of different materials with
  different band gaps. The higher band gap material
  is on the surface, absorbing high-energy photons
  while allowing lower-energy photons to be
  absorbed by the lower band gap material beneath.
  This technique can result in much higher
  efficiencies. Such cells, called multi-junction
  cells, can have more than one electric field.

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TFT Short for thin film transistor, a type of
LCD flat-panel display screen, in which each
pixel is controlled by from one to four
transistors. The TFT technology provides the best
resolution of all the flat-panel techniques, but
it is also the most expensive. TFT screens are
sometimes called active-matrix LCDs.
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