HIGH EFFICIENCY PHOTOVOLTAIC CELL FOR SOLAR ENERGY HARVESTING
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United States of America Patent
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Issued Date -
Apr 17, 2014
app pub date -
Nov 15, 2013
filing date -
Jun 24, 2009
priority date (Note) -
Abandoned
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Abstract
A photovoltaic cell comprising having improved absorption of electromagnetic radiation is disclosed. The photovoltaic cell can include a rear contact, a first cell having a first band-gap energy, and a rear contact in electrical communication with an electromechanical device. The first cell can include InxGaySbz, where x+y+z=1 and z ranges from 0.00001 to 0.025. the photovoltaic cell can also include a second cell having a second band-gap energy, and a first tunnel disposed between the first and second cells. The photovoltaic cell can include at least a third cell and a second tunnel disposed between the second and third cells. The uppermost cell can include GaP or InP.
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