Projects
Projects as Head
Publications
2025
Optical Simulations of Nanotextured All-Perovskite Tandem Solar Cells
Adv. Theory Simul., Vol.8, p. 2400724, 2025
Klaus Jäger, Alvarjo Tejada, Sebastian Berwig, Martin Hammerschmidt, Philipp Tockhorn, Steve Albrecht, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Optics for terawatt-scale photovoltaics: review and perspectives
Adv. Opt. Photonics, 17(1), pp. 185-294, 2025
Klaus Jäger, Urs Aeberhard, Esther Alarcon Llado, Benedikt Bläsi, Sven Burger, Bruno Ehrler, Wilfried Favre, Antonín Fejfar, Tristan Gageot, Ivan Gordon, Henning Helmers, Oliver Höhn, Olindo Isabella, Marko Jošt, Martin Ledinský, Jyotirmoy Mandal, Phillip Manley, Delfina Muñoz, Zunaid Omair, Juan Camilo Ortiz Lizcano, Ulrich W. Paetzold, Aaswath P. Raman, Hitoshi Sai, Rebecca Saive, Martina Schmid, Eli Yablonovitch, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Optimization strategies for colorful thin film solar cells
Proc. SPIE, p. PC133610E, Vol.PC13361, 2025
Jonas Schaible, Hanifah Winarto, Victor Skorjanc, Danbi Yoo, Lea Zimmermann, Andreas Wessels, Klaus Jäger, Ivan Sekuliĉ, Philipp-Immanuel Schneider, Benedikt Bläsi, Sven Burger, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
2024
A Roadmap on Optics for Terawatt Scale Photovoltaics
Advanced Photonics Congress 2024, p. STu2G.5, Technical Digest Series (Optica Publishing Group), 2024
Klaus Jäger, Sven Burger, Urs Aeberhard, Esther Alarcon Llado, Benedikt Bläsi, Bruno Ehrler, Wilfried Favre, Antonín Fejfar, Tristan Gageot, Ivan Gordon, Henning Helmers, Oliver Höhn, Olindo Isabella, Marko Jošt, Martin Ledinský, Jyotirmoy Mandal, Phillip Manley, Delfina Munoz, Juan Camilo Ortiz Lizcano, Ulrich W. Paetzold, Aaswath P. Raman, Hitoshi Sai, Rebecca Saive, Martina Schmid, Eli Yablonovitch, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Application of nowcasting to reduce the impact of irradiance ramps on PV power plants
EPJ Photovolt., Vol.15, p. 15, 2024
Jonas Schaible, Bijan Nouri, Lars Höpken, Tim Kotzab, Matthias Loevenich, Niklas Blum, Annette Hammer, Jonas Stührenberg, Klaus Jäger, Christiane Becker, Stefan Wilbert
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Jäger, Klaus, Dr.
DOI
Modelling bifacial irradiance – Step-by-step comparison and validation of view factor and ray tracing models
Appl. Energy, Vol.369, p. 123574, 2024
Marco Ernst, Charles-Alexis Asselineau, Peter Tillmann, Klaus Jäger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Modelling luminescent coupling in multi-junction solar cells: perovskite silicon tandem case study
Proc. SPIE, Vol.13014, p. 1301404, 2024
Phillip Manley, Martin Hammerschmidt, Lin Zschiedrich, Klaus Jäger, Christiane Becker, Sven Burger
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DOI
arXiv
Jäger, Klaus, Dr.
DOI
arXiv
On aesthetical appearance of colored perovskite solar modules
Proc. SPIE, p. PC1301406, Vol.PC13014, 2024
Jonas Schaible, Danbi Yoo, Hanifa Winarto, Alexandra Miaskiewicz, Steve Albrecht, Andreas Wessels, Benedikt Bläsi, Sven Burger, Klaus Jaeger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Optical challenges for terawatt-scale photovoltaics
Proc. SPIE, p. PC1301401, Vol.PC13014, 2024
Christiane Becker, Benedikt Bläsi, Sven Burger, Bruno Ehrler, Ivan Gordon, Olindo Isabella, Klaus Jäger, Marko Jost, Phillip Manley, Delfina Muñoz, Ulrich W. Paetzold, Hitoshi Sai, Eli Yablonovitch
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DOI
Jäger, Klaus, Dr.
DOI
2023
Comparative Optical Analysis of Imprinted Nano-, Micro- and Biotextures on Solar Glasses for Increased Energy Yield
Solar RRL, Vol.7, p. 2300071, 2023
Danbi Yoo, Peter Tillmann, Tobias Krauss, Johannes Sutter, Angelika Harter, Sergei Trofimov, Boris Naydenov, Klaus Jäger, Hubert Hauser, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Optical Simulations of Perovskite/Perovskite Tandem Solar Cells
Integrated Photonics Research, Silicon and Nanophotonics, p. JM4D.3, Optica Technical Digest Series, 2023
Klaus Jäger, Sebastian Berwig, Jona Kurpiers, Fengjiu Yang, Philipp Tockhorn, Steve Albrecht, Christiane Becker
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Jäger, Klaus, Dr.
DOI
2022
Improving perovskite/silicon tandem solar cells with optical simulations
Proc. SPIE, p. PC1215001, Vol.PC12150, 2022
Klaus Jäger, Johannes Sutter, Philipp Tockhorn, Martin Hammerschmidt, Philipp-Immanuel Schneider, Steve Albrecht, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Model-Chain Validation for Estimating the Energy Yield of Bifacial Perovskite/Silicon Tandem Solar Cells
Sol. RRL, Vol.6, p. 2200079, 2022
Peter Tillmann, Klaus Jäger, Asher Karsenti, Lev Kreinin, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Nano-optical designs for high-efficiency monolithic perovskite–silicon tandem solar cells
Nat. Nanotechnol., Vol.17, p. 1214, 2022
Philipp Tockhorn, Johannes Sutter, Alexandros Cruz, Philipp Wagner, Klaus Jäger, Danbi Yoo, Felix Lang, Max Grischek, Bor Li, Jinzhao Li, Oleksandra Shargaieva, Eva Unger, Amran Al-Ashouri, Eike Köhnen, Martin Stolterfoth, Dieter Neher, Rutger Schlatmann, Bernd Rech, Bernd Stannowski, Steve Albrecht, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Nanooptically Enhanced Perovskite/Silicon Tandem Solar Cells with 29.80% Power Conversion Efficiency
OSA Adv. Photonics, p. JTu4H.2, OSA Technical Digest, 2022
Philipp Tockhorn, Johannes Sutter, Alexandros Cruz, Philipp Wagner, Klaus Jäger, Danbi Yoo, Felix Lang, Max Grischek, Bor Li, Amran Al-Ashouri, Eike Köhnen, Martin Stolterfoht, Dieter Neher, Rutger Schlatmann, Bernd Rech, Bernd Stannowski, Steve Albrecht, Christiane Becker
BibTeX
DOI
Jäger, Klaus, Dr.
DOI
2021
Nanophotonics for Solar Energy
Sol. Energy Mater. Sol. Cells, Vol.221, p. 110916, 2021
Christiane Becker, Klaus Jäger, Sven Burger
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DOI
Jäger, Klaus, Dr.
DOI
Optical simulations of nanotextured perovskite/silicon tandem solar cell
HZB Data Service, 2021
Klaus Jäger, Johannes Sutter, Philipp-Immanuel Schneider, Martin Hammerschmidt, Christiane Becker
BibTeX
DOI
Jäger, Klaus, Dr.
DOI
Optimizing metal grating back reflectors for III-V-on-silicon multijunction solar cells
Opt. Express, Vol.29, p. 22517, 2021
Peter Tillmann, Benedikt Bläsi, Sven Burger, Martin Hammerschmidt, Oliver Höhn, Christiane Becker, Klaus Jäger
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Jäger, Klaus, Dr.
DOI
Perovskite/silicon tandem solar cells: Effect of luminescent coupling and bifaciality
Sol. RRL, Vol.5, p. 2000628, 2021
Klaus Jäger, Peter Tillmann, Eugene A. Katz, Christiane Becker
BibTeX
arXiv
DOI
Jäger, Klaus, Dr.
arXiv
DOI
Prospects of light management in perovskite/silicon tandem solar cells
Nanophotonics, Vol.10, p. 1991, 2021
Klaus Jäger, Johannes Sutter, Martin Hammerschmidt, Philipp-Immanuel Schneider, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Relaxed current-matching constraints by bifacial operation and luminescent coupling in perovskite/silicon tandem solar cells
2021 IEEE 48th Photovoltaic Specialists Conference (PVSC), p. 1086, 2021
Peter Tillmann, Klaus Jäger, Eugene Katz, Christiane Becker
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Jäger, Klaus, Dr.
DOI
2020
Detailed illumination model for bifacial solar cells
Opt. Express, Vol.28, p. 4751, 2020
Klaus Jäger, Peter Tillmann, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Improved Quantum Efficiency by Advanced Light Management in Nanotextured Solution-Processed Perovskite Solar Cells
ACS Photonics, Vol.7, p. 2589, 2020
Philipp Tockhorn, Johannes Sutter, Rémi Colom, Lukas Kegelmann, Amran Al-Ashouri, Marcel Roß, Klaus Jäger, Thomas Unold, Sven Burger, Steve Albrecht, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Minimising levelised cost of electricity of bifacial solar panel arrays using Bayesian optimisation
Sustain. Energy Fuels, Vol.4, p. 254, 2020
Peter Tillmann, Klaus Jäger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Simulating bifacial perovskite/silicon tandem solar cells in large PV fields
OSA Advanced Photonics Congress, p. PvTh1G.3, OSA Technical Digest, 2020
Klaus Jäger, Peter Tillmann, Eugene A. Katz, Christiane Becker
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Jäger, Klaus, Dr.
DOI
2019
Improving Monolithic Perovskite/Silicon Tandem Solar Cells From an Optical Viewpoint
OSA Advanced Photonics Congress, p. PM4C.2, OSA Technical Digest, 2019
Klaus Jäger, Marko Jošt, Johannes Sutter, Philipp Tockhorn, Eike Köhnen, David Eisenhauer, Phillip Manley, Steve Albrecht, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
Nanooptische Simulationen für optoelektronische Anwendungen
Photonik: Fachzeitschrift für die optischen Technologien, 2019(2), pp. 42-45, 2019
Christiane Becker, Sven Burger, Klaus Jäger
BibTeX
Jäger, Klaus, Dr.
Nanophotonic enhanced perovskite-silicon solar cell devices
The 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2019), Said Zhoudi, Antonio Topa (Eds.), p. 858, 2019
Christiane Becker, Phillip Manley, Klaus Jäger, David Eisenhauer, Johannes Sutter, Steve Albrecht, Kaibo Zheng, Tonu Pullerits, Sven Burger
BibTeX
Jäger, Klaus, Dr.
2018
Antireflective nanotextures for monolithic perovskite-silicon tandem solar cells
Proc. SPIE, Vol.10688, p. 106880A, 2018
Klaus Jäger, Phillip Manley, Duote Chen, Philipp Tockhorn, David Eisenhauer, Grit Köppel, Martin Hammerschmidt, Sven Burger, Steve Albrecht, Christiane Becker
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DOI
arXiv
Jäger, Klaus, Dr.
DOI
arXiv
Light management with sinusoidal nanotextures
Light, Energy and the Environment 2018, p. OT5C.5, OSA Technical Digest, 2018
Klaus Jäger, Phillip Manley, David Eisenhauer, Philipp Tockhorn, Johannes Sutter, Martin Hammerschmidt, Sven Burger, Steve Albrecht, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Nanophotonic Light Management for Perovskite-Silicon Tandem Solar Cells
J. Photonics Energy, Vol.8, p. 022601, 2018
Duote Chen, Phillip Manley, Philipp Tockhorn, David Eisenhauer, Grit Köppel, Martin Hammerschmidt, Sven Burger, Steve Albrecht, Christiane Becker, Klaus Jäger
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DOI
arXiv
Jäger, Klaus, Dr.
DOI
arXiv
Nanophotonic enhanced two-photon excited photoluminescence of perovskite quantum dots
ACS Photonics, Vol.5, p. 4668, 2018
Christiane Becker, Sven Burger, Carlo Barth, Phillip Manley, Klaus Jäger, David Eisenhauer, Grit Köppel, Pavel Chabera, Junsheng Chen, Kaibo Zheng, Tönu Pullerits
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DOI
arXiv
Jäger, Klaus, Dr.
DOI
arXiv
On accurate simulations of thin-film solar cells with a thick glass superstrate
Opt. Express, Vol.26, p. A99, 2018
Klaus Jäger, Grit Köppel, Martin Hammerschmidt, Sven Burger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Optimization of nanostructured high efficiency perovskite/c-Si tandem solar cells via numerical simulation
Proc. SPIE, p. 107310B, Vol.10731, 2018
Phillip Manley, Klaus Jäger, Philipp Tockhorn, Sven Burger, Steve Albrecht, Christiane Becker
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Jäger, Klaus, Dr.
DOI
2017
Accurate optical simulations of periodic nanostructures on a thick glass substrate
29th Workshop on Quantum Solar Energy Conversion - (QUANTSOL), 2017
Klaus Jäger, Grit Köppel, Martin Hammerschmidt, Sven Burger, Christiane Becker
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Jäger, Klaus, Dr.
BibTeX
Optical simulations of advanced light management for liquid-phase crystallized silicon thin-film solar cells
Proc. SPIE, Vol.10356, p. 103560F, 2017
Klaus Jäger, Grit Köppel, David Eisenhauer, Duote Chen, Martin Hammerschmidt, Sven Burger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Smooth anti-reflective three-dimensional textures for liquid phase crystallized silicon thin-film solar cells on glass
Sci. Rep., Vol.7, p. 2658, 2017
David Eisenhauer, Grit Köppel, Klaus Jäger, Duote Chen, Oleksandra Shargaieva, Paul Sonntag, Daniel Armkreutz, Bernd Rech, Christiane Becker
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arXiv
DOI
Jäger, Klaus, Dr.
arXiv
DOI
2016
On Accurate Simulations of Thin-Film Solar Cells With a Thick Glass Superstrate
Light, Energy and the Environment 2016, p. PM3B.5, OSA Technical Digest, 2016
Klaus Jäger, Martin Hammerschmidt, Grit Köppel, Sven Burger, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Optical Properties of Smooth Anti-reflective Three-dimensional Textures for Silicon Thin-film Solar Cells
Energy Procedia, Vol.102, pp. 27-35, 2016
David Eisenhauer, Klaus Jäger, Grit Köppel, Bernd Rech, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Simulations of sinusoidal nanotextures for coupling light into c-Si thin-film solar cells
Opt. Express, Vol.24, p. A569, 2016
Klaus Jäger, Carlo Barth, Martin Hammerschmidt, Sven Herrmann, Sven Burger, Frank Schmidt, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Sinusoidal Nanotextures for Enhanced Light Management in Thin-Film Solar Cells
28th Workshop on Quantum Solar Energy Conversion - (QUANTSOL), European Society for Quantum Solar Energy Conversion (Ed.), 2016
Klaus Jäger, Carlo Barth, Martin Hammerschmidt, Sven Herrmann, Sven Burger, Frank Schmidt, Christiane Becker
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Jäger, Klaus, Dr.
BibTeX
Sinusoidal gratings for optimized light management in c-Si thin-film solar cells
Proc. SPIE, Vol.9898, p. 989808, 2016
Klaus Jäger, Grit Köppel, Carlo Barth, Martin Hammerschmidt, Sven Herrmann, Sven Burger, Frank Schmidt, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI
2015
Design of Photonic Crystals with Near-Surface Field Enhancement
Light, Energy and the Environement 2015, p. JTu5A.9, OSA Technical Digest, 2015
Carlo Barth, Klaus Jäger, Sven Burger, Martin Hammerschmidt, Frank Schmidt, Christiane Becker
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Jäger, Klaus, Dr.
DOI
Sinusoidal Nanotextures for Coupling Light into c-Si Thin-Film Solar Cells
Light, Energy and the Environement 2015, p. PTu4B.3, OSA Technical Digest, 2015
Klaus Jäger, Carlo Barth, Martin Hammerschmidt, Sven Herrmann, Sven Burger, Frank Schmidt, Christiane Becker
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DOI
Jäger, Klaus, Dr.
DOI