Epitaxial lift-off in photovoltaics: Ultra thin Al{sub 0.2}Ga{sub 0.8}As cell in a mechanically stacked (Al,Ga)As/Si tandem
Conference
·
OSTI ID:191150
- Centre National de la Recherche Scientifique, Valbonne (France). Centre de Recherche sur l`Hetero-Epitaxie et ses Applications
The potential of high conversion efficiency of solar energy through the combination of Al{sub 0.2}Ga{sub 0.8}As and Si cells is illustrated by a mechanically stacked tandem using for the first time the epitaxial lift-off (ELO) technique to remove the top cell from its substrate. The selective etching of the GaAs substrate provides efficient light transmission to the bottom cell. Photoluminescence decay experiments show also that substrate removal enhances photon recycling effects. The measured efficiency of the Al{sub 0.2}Ga{sub 0.8}As/Si tandem reaches 21% AM1.5.
- OSTI ID:
- 191150
- Report Number(s):
- CONF-941203--; ISBN 0-7803-1459-X
- Country of Publication:
- United States
- Language:
- English
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Book
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Related Subjects
14 SOLAR ENERGY
36 MATERIALS SCIENCE
ALUMINIUM ARSENIDE SOLAR CELLS
ANTIREFLECTION COATINGS
ELECTRON MICROPROBE ANALYSIS
ETCHING
FABRICATION
GALLIUM ARSENIDE SOLAR CELLS
ORGANOMETALLIC COMPOUNDS
PERFORMANCE
PHOTOLUMINESCENCE
QUANTUM EFFICIENCY
REMOVAL
SILICON SOLAR CELLS
SPECTRAL RESPONSE
THIN FILMS
VAPOR PHASE EPITAXY
X-RAY DIFFRACTION
36 MATERIALS SCIENCE
ALUMINIUM ARSENIDE SOLAR CELLS
ANTIREFLECTION COATINGS
ELECTRON MICROPROBE ANALYSIS
ETCHING
FABRICATION
GALLIUM ARSENIDE SOLAR CELLS
ORGANOMETALLIC COMPOUNDS
PERFORMANCE
PHOTOLUMINESCENCE
QUANTUM EFFICIENCY
REMOVAL
SILICON SOLAR CELLS
SPECTRAL RESPONSE
THIN FILMS
VAPOR PHASE EPITAXY
X-RAY DIFFRACTION