M
Michael Schachtner
Researcher at Fraunhofer Society
Publications - 41
Citations - 1216
Michael Schachtner is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Solar cell & Wafer. The author has an hindex of 12, co-authored 35 publications receiving 1014 citations.
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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
Fabrication of GaInP/GaAs//Si Solar Cells by Surface Activated Direct Wafer Bonding
Karen Derendorf,Stephanie Essig,E. Oliva,V. Klinger,Tobias Roesener,Simon P. Philipps,Jan Benick,Martin Hermle,Michael Schachtner,Gerald Siefer,Wolfgang Jäger,Frank Dimroth +11 more
TL;DR: In this article, a triple-junction solar cell with three active p-n junctions was fabricated by surface activated direct wafer bonding between GaAs and Si, which leads to a conductive and transparent interface.
Journal ArticleDOI
Wafer-Bonded GaInP/GaAs//Si Solar Cells With 30% Efficiency Under Concentrated Sunlight
TL;DR: In this paper, a fabrication process based on direct wafer bonding was proposed for high efficient III-V/Si triple-junction solar cells, which enabled a transparent and electrically conductive interface.
Journal ArticleDOI
Influence of temperature and irradiance on triple-junction solar subcells
TL;DR: In this paper, the I-V-curve of the Ge bottom cell of a triple-junction Ga0.50In0.01As was investigated under a broad range of operating conditions, namely temperatures T from 5 to 170°C and concentration ratios C from 1 to 3000.
New Efficiency Frontiers with Wafer-Bonded Multi-Junction Solar Cells.
A. Dobrich,Klaus Schwarzburg,Thomas Hannappel,Thomas Signamarcheix,Aurélie Tauzin,J. Wasselin,B. Hoarau,L. Farrugia,F. Janin,Charlotte Drazek,C. Charles-Alfred,Eric Guiot,C. Arena,M. Muñoz-Rico,Nicolas Blanc,M. Piccin,Rainer Krause,Andreas W. Bett,Frank Dimroth,Michael Schachtner,A. Wekkeli,Gerald Siefer,E. Oliva,C. Karcher,Matthias Grave,Paul Beutel,T.N.D. Tibbits +26 more
TL;DR: In this paper, a 4J wafer-bonded solar cell with bandgaps 1.88 / 1.45 / 0.73 eV was presented with an improved efficiency of 46.5% at 324x by Fraunhofer ISE.