High efficiency thin-film crystalline Si/Ge tandem solar cell.
We propose and simulate a photovoltaic solar cell comprised of Si and Ge pn junctions in tandem. With an anti-reflection film at the front surface, we have shown that optimal solar cells favor a thin Si layer and a thick Ge layer with a thin tunnel hetero-diode placed in between. We predict efficiency ranging from 19% to 28% for AM1.5G solar irradiance concentrated from 1 approximately 1000 Suns for a cell with a total thickness approximately 100 microm.
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Department of Physics, University of Massachusetts Boston, 100 Morrissey Blvd, Boston, MA 02125, USA. greg.sun@umb.edu
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D003461:Crystallography / Q000379:methods; D011211:Electric Power Supplies; D004566:Electrodes; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005857:Germanium / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D008567:Membranes, Artificial; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry* / Q000528:radiation effects; D012993:Solar Energy
D008567:Membranes, Artificial; D005857:Germanium; D012825:Silicon