Journal ArticleDOI
Four-Junction Wafer-Bonded Concentrator Solar Cells
Frank Dimroth,T.N.D. Tibbits,M. Niemeyer,Felix Predan,Paul Beutel,Christian Karcher,E. Oliva,Gerald Siefer,David Lackner,Peter Fus-Kailuweit,Andreas Bett,Rainer Krause,Charlotte Drazek,Eric Guiot,Jocelyne Wasselin,Aurélie Tauzin,Thomas Signamarcheix +16 more
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TLDR
In this article, three cell architectures are presented using the same two top junctions of GaInP/GaAs but different infrared absorbers based on Germanium, GaSb, or GaInAs on InP.Abstract:
The highest solar cell conversion efficiencies are achieved with four-junction devices under concentrated sunlight illumination. Different cell architectures are under development, all targeting an ideal bandgap combination close to 1.9, 1.4, 1.0, and 0.7 eV. Wafer bonding is used in this work to combine materials with a significant lattice mismatch. Three cell architectures are presented using the same two top junctions of GaInP/GaAs but different infrared absorbers based on Germanium, GaSb, or GaInAs on InP. The modeled efficiency potential at 500 suns is in the range of 49–54% for all three devices, but the highest efficiency is expected for the InP-based cell. An efficiency of 46% at 508 suns was already measured by AIST in Japan for a GaInP/GaAs//GaInAsP/GaInAs solar cell and represents the highest independently confirmed efficiency today. Solar cells on Ge and GaSb are in the development phase at Fraunhofer ISE, and the first demonstration of functional devices is presented in this paper.read more
Citations
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Journal ArticleDOI
Solar cell efficiency tables (version 57)
Martin A. Green,Ewan D. Dunlop,Jochen Hohl-Ebinger,Masahiro Yoshita,Nikos Kopidakis,Xiaojing Hao +5 more
Journal ArticleDOI
Solar cell efficiency tables (Version 55)
Martin A. Green,Ewan D. Dunlop,Jochen Hohl-Ebinger,Masahiro Yoshita,Nikos Kopidakis,Anita Ho-Baillie +5 more
Journal ArticleDOI
Solar cell efficiency tables (Version 53)
Martin A. Green,Yoshihiro Hishikawa,Ewan D. Dunlop,Dean H. Levi,Jochen Hohl-Ebinger,Masahiro Yoshita,Anita Ho-Baillie +6 more
References
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Thin-film optical filters
TL;DR: In this paper, the authors present a theoretical analysis of thin-film dielectric materials and apply it to filter and coating applications, showing that layer uniformity and thickness monitoring are important factors affecting layer and coating properties.
Journal ArticleDOI
Wafer bonded four-junction GaInP/GaAs//GaInAsP/GaInAs concentrator solar cells with 44.7% efficiency
Frank Dimroth,Matthias Grave,Paul Beutel,Ulrich Fiedeler,Christian Karcher,T.N.D. Tibbits,E. Oliva,Gerald Siefer,Michael Schachtner,A. Wekkeli,Andreas W. Bett,Rainer Krause,M. Piccin,Nicolas Blanc,Charlotte Drazek,Eric Guiot,Bruno Ghyselen,Thierry Salvetat,Aurélie Tauzin,Thomas Signamarcheix,Anja Dobrich,Thomas Hannappel,Klaus Schwarzburg +22 more
TL;DR: In this paper, a GaAs-based top tandem solar cell structure was bonded to an InP-based bottom tandem cell with a difference in lattice constant of 3.7%.
Journal ArticleDOI
Solar cell efficiency tables (version 44)
TL;DR: In this paper, the authors present a list of the highest independently confirmed efficiencies for solar cells and modules and provide guidelines for inclusion of results into these tables and new entries since January 2010 are reviewed.
Journal ArticleDOI
Optical dispersion relations for GaP, GaAs, GaSb, InP, InAs, InSb, AlxGa1−xAs, and In1−xGaxAsyP1−y
TL;DR: In this paper, a method for calculation of the optical constants (the refractive index, extinction coefficient, and absorption coefficient) of some III-V binaries (GaP, GaAs, GaSb, InP, InAs, and InSb), ternaries (AlxGa1−xAs), and quaternaries (In 1−xGaxAsyP1−y) in the entire range of photon energies (0−6.0 eV).
Journal ArticleDOI
Band gaps and refractive indices of AlGaAsSb, GaInAsSb, and InPAsSb: Key properties for a variety of the 2–4‐μm optoelectronic device applications
TL;DR: In this article, the lattice constant, the lowest direct and indirect gap energies, and the refractive index of a quaternary lattice matched to GaSb and InAs were calculated using an interpolation scheme and the effects of compositional variations were properly taken into account in calculations.
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