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Author Lee, Kyusang ♦ Shiu, Kuen-Ting ♦ Zimmerman, Jeramy D. ♦ Forrest, Stephen R. ♦ Renshaw, Christopher K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ATOMIC FORCE MICROSCOPY ♦ ELECTRON DIFFRACTION ♦ ENERGY CONVERSION ♦ ETCHING ♦ INDIUM PHOSPHIDES ♦ LAYERS ♦ MOLECULAR BEAM EPITAXY ♦ MONOCRYSTALS ♦ PERFORMANCE ♦ QUANTUM EFFICIENCY ♦ SCHOTTKY BARRIER SOLAR CELLS ♦ SEMICONDUCTOR MATERIALS ♦ SUBSTRATES ♦ SURFACES ♦ THIN FILMS ♦ TIN OXIDES ♦ WELDING ♦ X-RAY PHOTOELECTRON SPECTROSCOPY ♦ CHALCOGENIDES ♦ COHERENT SCATTERING ♦ CONVERSION ♦ CRYSTAL GROWTH METHODS ♦ CRYSTALS ♦ DIFFRACTION ♦ DIRECT ENERGY CONVERTERS ♦ EFFICIENCY ♦ ELECTRON SPECTROSCOPY ♦ EPITAXY ♦ EQUIPMENT ♦ FABRICATION ♦ FILMS ♦ INDIUM COMPOUNDS ♦ JOINING ♦ MATERIALS ♦ MICROSCOPY ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ PHOSPHIDES ♦ PHOSPHORUS COMPOUNDS ♦ PHOTOELECTRIC CELLS ♦ PHOTOELECTRON SPECTROSCOPY ♦ PHOTOVOLTAIC CELLS ♦ PNICTIDES ♦ SCATTERING ♦ SOLAR CELLS ♦ SOLAR EQUIPMENT ♦ SPECTROSCOPY ♦ SURFACE FINISHING ♦ TIN COMPOUNDS
Abstract We demonstrate multiple growths of flexible, thin-film indium tin oxide-InP Schottky-barrier solar cells on a single InP wafer via epitaxial lift-off (ELO). Layers that protect the InP parent wafer surface during the ELO process are subsequently removed by selective wet-chemical etching, with the active solar cell layers transferred to a thin, flexible plastic host substrate by cold welding at room temperature. The first- and second-growth solar cells exhibit no performance degradation under simulated Atmospheric Mass 1.5 Global (AM 1.5G) illumination, and have a power conversion efficiency of {eta}{sub p}=14.4{+-}0.4% and {eta}{sub p}=14.8{+-}0.2%, respectively. The current-voltage characteristics for the solar cells and atomic force microscope images of the substrate indicate that the parent wafer is undamaged, and is suitable for reuse after ELO and the protection-layer removal processes. X-ray photoelectron spectroscopy, reflection high-energy electron diffraction observation, and three-dimensional surface profiling show a surface that is comparable or improved to the original epiready wafer following ELO. Wafer reuse over multiple cycles suggests that high-efficiency; single-crystal thin-film solar cells may provide a practical path to low-cost solar-to-electrical energy conversion.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-09-06
Publisher Place United States
Journal Applied Physics Letters
Volume Number 97
Issue Number 10


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