HIGH-CONCENTRATION MULTI-JUNCTION SOLAR CELL AND METHOD FOR FABRICATING SAME
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United States of America Patent
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Issued Date -
Apr 3, 2014
app pub date -
May 7, 2012
filing date -
Jun 22, 2011
priority date (Note) -
Abandoned
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Abstract
A high-concentration multi-junction solar cell and method for fabricating same is provided. The high-concentration multi-junction solar cell comprises a top cell, an intermediate cell, a bottom cell and two tunneling junctions connecting the top cell and intermediate cell and the intermediate cell and bottom cell. The emitter layers of the top and intermediate cells both employ the graded doping concentrations and have high open circuit voltage and short circuit current. The top cell emitter layer is over several hundred nanometers thicker than that of the traditional multi-junction cell so as to decrease the whole series resistance of the multi-junction cell, improve the fill factor, and gain higher photoelectric conversion efficiency.
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