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Title: Silicon-based 2 Terminal Tandem Solar Cells with Lattice-Matched Buffer Layers
Authors: KOMATSU, Yuji
FUYUKI, Takashi
MATSUNAMI, Hiroyuki
Issue Date: 29-Jul-1994
Publisher: Faculty of Engineering, Kyoto University
Journal title: Memoirs of the Faculty of Engineering, Kyoto University
Volume: 56
Issue: 3
Start page: 97
End page: 116
Abstract: A novel structure for a Si-based 2-terminal tandem solar cell was proposed. The structure was optimized to get high efficiency considering the realistic material parameters. Gallium arsenide phosphide (GaAs₁₋xPx) and indium gallium phosphide (In₁₋xGaxP) were suggested as a top-cell material. A semi-empirical method was proposed to calculate the absorption coefficients of GaAs₁₋xPx and In₁₋xGaxP at any value of the composition x. The conversion efficiency of the cell was calculated by simulating its voltage-current characteristics. It was shown that an efficiency of 33.1% can be obtained for a GaAs.₇₃P.₂₇/Si cell and 34.2% for an In.₅₇Ga.₄₃P/Si cell. In₁₋xGaxP was shown to be more promising because of its larger absorption coefficient than GaAs₁₋xPx's.
URI: http://hdl.handle.net/2433/281493
Appears in Collections:Vol.56 Part 3

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