• seit 2015: Wissenschaftlicher Mitarbeiter am Helmholtz-Zentrum Berlin
    Stellvertretender Abteilungsleiter der Abteilung Solarenergieoptik
    Direktor des Joint Lab BerOSE zwischen HZB, Zuse Institut Berlin und FU Berlin
    2015-2017 Co-Chair der Postdoc Vertretung

  • 2013-2014: Postdoc an der TU Delft (Niederlande)

  • 2012-2013: Wissenschaftlicher Mitarbeiter bei Nuon Helianthos BV (Arnhem, Niederlande)

  • 2012: Promotion an der TU Delft (Niederlande); "On the Scalar Scattering Theory for Thin-Film Solar Cells"

Veröffentlichungen

2022


  • Blaesi, B.; Hanser, M.; Jäger, K.; Höhn, O.: Light trapping gratings for solar cells: an analytical period optimization approach. Optics Express 30 (2022), p. 24762-24772

  • Tillmann, P.; Jäger, K.; Karsenti, A.; Kreinin, L.; Becker, C.: Model-Chain Validation for Estimating the Energy Yield of Bifacial Perovskite/Silicon Tandem Solar Cells. Solar RRL 6 (2022), p. 2200079/1-12

  • Tockhorn, P.; Sutter, J.; Cruz, A.; Wagner, P.; Jäger, K.; Yoo, D.; Lang, F.; Grischek, M.; Li, B.; Li, J.; Shargaieva, O.; Unger, E.; Al-Ashouri, A.; Köhnen, E.; Stolterfoht, M.; Neher, D.; Schlatmann, R.; Rech, B.; Stannowski, B.; Albrecht, S.; Becker, C.: Nano-optical designs for high-efficiency monolithic perovskite–silicon tandem solar cells. Nature Nanotechnology 17 (2022), p. 1214–1221

2021


  • Jäger, K.; Sutter, J.; Hammerschmidt, M.; Schneider, P.-I.; Becker, C.: Prospects of light management in perovskite/silicon tandem solar cells. Nanophotonics 10 (2021), p. 1991-2000

  • Jäger, K.; Tillmann, P.; Katz, E.A.; Becker, C.: Perovskite/Silicon Tandem Solar Cells: Effect of Luminescent Coupling and Bifaciality. Solar RRL 5 (2021), p. 2000628/1-9

  • Rössig, W.; Jäger, K.; Parbel, L.: Museum als Austauschforum – Aktivisti und Wissenschaft im Dialog. Museumskunde : Fachzeitschrift für die Museumswelt 86 (2021), p. 56-62
    https://www.museumsbund.de/publikationen/50777/#post-50823

  • Tillmann, P.; Bläsi, B.; Burger, S.; Hammerschmidt, M.; Höhn, O.; Becker, C.; Jäger, K.: Optimizing metal grating back reflectors for III-V-on-silicon multijunction solar cells. Optics Express 29 (2021), p. 22517-22532

  • Tillmann, P.; Jäger, K.; Katz, E.A.; Becker, C.: Relaxed current-matching constraints by bifacial operation and luminescent coupling in perovskite/silicon tandem solar cells. In: 48th IEEE Photovoltaic Specialists Conference, PVSC 2021 : Fort Lauderdale, Florida, USA, 20 – 25 June 2021, onlinePiscataway, NJ: IEEE, 2021. - ISBN 978-1-6654-3018-0, p. 1086-1088

2020


  • Bermel, P.; Saive, R.; Jäger, K.; Yoo, S.: Feature issue introduction: Optical Devices and Materials for Solar Energy and Solid-state Lighting (PVLED) 2019. Optics Express 28 (2020), p. 16027-16029

  • Jäger, K.; Tillmann, P.; Becker, C.: Detailed illumination model for bifacial solar cells. Optics Express 28 (2020), p. 4751-4762

  • Jäger, K.; Tillmann, P.; Katz, E.A.; Becker, C.: Simulating bifacial perovskite/silicon tandem solar cells in large PV fields. In: Optical Devices and Materials for Solar Energy and Solid-state Lighting, PVLED 2020 : Washington; United States; 13 July 2020 through 16 July 2020Optical Society of America, 2020. - ISBN 978-1-943580-79-8, p. PvTh1G.3/1-2

  • Tillmann, P.; Jäger, K.; Becker, C.: Minimising levelised cost of electricity of bifacial solar panel arrays using Bayesian optimisation. Sustainable Energy & Fuels 4 (2020), p. 254-264

  • Tockhorn, P.; Sutter, J.; Colom, R.; Kegelmann, L.; Al-Ashouri, A.; Roß, M.; Jäger, K.; Unold, T.; Burger, S.; Albrecht, S.; Becker, C.: Improved Quantum Efficiency by Advanced Light Management in Nanotextured Solution-Processed Perovskite Solar Cells. ACS Photonics 7 (2020), p. 2589–2600

2019


  • Becker, C.; Burger, S.; Jäger, K.: Nanooptische Simulationen für optoelektronische Anwendungen. Photonik – Fachzeitschrift für Optische Technologien 2 (2019), p. 42-45
    https://www.photonik.de/nanooptische-simulationen-fuer-optoelektronische-anwendungen/150/21005/386489

  • Jäger, K.; Jošt, M.; Sutter, J.; Tockhorn, P.; Köhnen, E.; Eisenhauer, D.; Manley, P.; Albrecht, S.; Becker, C.: Improving Monolithic Perovskite/Silicon Tandem Solar Cells From an Optical Viewpoint. In: OSA Advanced Photonics Congress (AP) 2019 (IPR, Networks, NOMA, SPPCom, PVLED) : 29 July–2 August 2019, Burlingame, California, United StatesOptical Society of America, 2019. - ISBN 978-1-943580-64-4, p. PM4C.2/1-2

  • Jäger, K.; Tillmann, P.; Tejada, A.; Karsenti, A.; Kreinin, L.; Visoly-Fisher, I.; Korte, L.; Unger, E.; Katz, E.A.; Becker, C.: Optical assessment of perovskite-enhanced bifacial silicon solar modules. In: 36th European Photovoltaic Solar Energy Conference and ExhibitionMünchen: WIP Wirtschaft und Infrastruktur, 2019. - ISBN 3-936338-60-4, p. 634-637

2018


  • Becker, C.; Burger, S.; Barth, C.; Manley, P.; Jäger, K.; Eisenhauer, D.; Köppel, G.; Chabera, P.; Chen, J.; Zheng, K.; Pullerits, T.: Nanophotonic-Enhanced Two-Photon-Excited Photoluminescence of Perovskite Quantum Dots. ACS Photonics 5 (2018), p. 4668-4676

  • Chen, D.; Manley, P.; Tockhorn, P.; Eisenhauer, D.; Köppel, G.; Hammerschmidt, M.; Burger, S.; Albrecht, S.; Becker, C.; Jäger, K.: Nanophotonic light management for perovskite–silicon tandem solar cells. Journal of Photonics for Energy 8 (2018), p. 022601/1-14

  • Jäger, K.; Chen, D.; Tockhorn, P.; Eisenhauer, D.; Köppel, G.; Manley, P.; Hammerschmidt, M.; Burger, S.; Albrecht, S.; Becker, C.: Antireflective nanotextures for monolithic perovskite-silicon tandem solar cells. In: Ralf B. Wehrspohn, Alexander N. Sprafke [Ed.] : Photonics for Solar Energy Systems VII : 23-25 April 2018, Strasbourg, France Bellingham, Wash.: SPIE, 2018 (Proceedings of SPIE ; 10688). - ISBN 978-1-5106-1902-9, p. 10688A/1-7

  • Jäger, K.; Köppel, G.; Hammerschmidt, M.; Burger, S.; Becker, C.: On accurate simulations of thin-film solar cells with a thick glass superstrate. Optics Express 26 (2018), p. A99-A107

  • Jäger, K.; Manley, P.; Eisenhauer, D.; Tockhorn, P.; Sutter, J.; Hammerschmidt, M.; Burger, S.; Albrecht, S.; Becker, C.: Light management with sinusoidal nanotextures. In: Optics for Solar Energy 2018 : Singapore Singapore 5–8 November 2018Optical Society of America, 2018. - ISBN 978-1-943580-47-7, p. OTC5C.5/1-2

  • Jošt, M.; Köhnen, E.; Morales-Vilches, A.B.; Lipovšek, B.; Jäger, K.; Macco, B.; Al-Ashouri, A.; Krc, J.; Korte, L.; Rech, B.; Schlatmann, R.; Topic, M.; Stannowski, B.; Albrecht, S.: Textured interfaces in monolithic perovskite/silicon tandem solar cells: advanced light management for improved efficiency and energy yield. Energy & Environmental Science 11 (2018), p. 3511-3523

  • MacQueen, R.W.; Liebhaber, M.; Niederhausen, J.; Mews, M.; Gersmann, C.; Jäckle, S.; Jäger, K.; Tayebjee, M.J.Y.; Schmidt, T.W.; Rech, B.; Lips, K.: Crystalline silicon solar cells with tetracene interlayers: the path to silicon-singlet fission heterojunction devices. Materials Horizons 5 (2018), p. 1065-1075

  • Mazzarella, L.; Werth, M.; Jäger, K.; Jošt, M.; Korte, L.; Albrecht, S.; Schlatmann, R.; Stannowski, B.: Infrared photocurrent management in monolithic perovskite/silicon heterojunction tandem solar cells by using a nanocrystalline silicon oxide interlayer. Optics Express 26 (2018), p. A487-A497

  • Trinh, C.T.; Preissler, N.; Sonntag, P.; Muske, M.; Jäger, K.; Trahms, M.; Schlatmann, R.; Rech, B.; Amkreutz, D.: Potential of interdigitated back-contact silicon heterojunction solar cells for liquid phase crystallized silicon on glass with efficiency above 14%. Solar Energy Materials and Solar Cells 174 (2018), p. 187-195

2017


  • Eisenhauer, D.; Köppel, G.; Jäger, K.; Chen, D.; Shargaieva, O.; Sonntag, P.; Amkreutz, D.; Rech, B.; Becker, C.: Smooth anti-reflective three-dimensional textures for liquid phase crystallized silicon thin-film solar cells on glass. Scientific Reports 7 (2017), p. 2658/1-10

  • Jäckle, S.; Liebhaber, M.; Gersmann, C.; Mews, M.; Jäger, K.; Christiansen, S.; Lips, K.: Potential of PEDOT:PSS as a hole selective front contact for silicon heterojunction solar cells. Scientific Reports 7 (2017), p. 2170/1-8

  • Jäger, K.; Köppel, G.; Eisenhauer, D.; Chen, D.; Hammerschmidt, M.; Burger, S.; Becker, C.: Optical simulations of advanced light management for liquid-phase crystallized silicon thin-film solar cells. In: Yi-Jun Jen ... [Ed.] : Nanostructured Thin Films X : 9-10 August 2017, San Diego, California, United StatesBellingham, Washington, USA: SPIE, 2017 (Proceedings of SPIE ; 10356). - ISBN 978-1-5106-1169-6, p. 103560F/1-7

  • Jäger, K.; Korte, L.; Rech, B.; Albrecht, S.: Numerical Optical Optimization of Planar Perovskite-Silicon Tandem Solar Cells with Regular and Inverted Device Architectures. Optics Express 25 (2017), p. A473-A482

2016


  • Albrecht, S.; Saliba, M. ; Correa-Baena, J.-P. ; Jaeger, K.; Korte, L. ; Hagfeldt, A. ; Grätzel, M.; Rech, B. : Towards optical optimization of planar monolithic perovskite/silicon-heterojunction tandem solar cells. Journal of Optics 18 (2016), p. 064012/1-10

  • Albrecht, S.; Saliba, M.; Correa-Baena, J.-P.; Jäger, K.; Korte, L.; Hagfeldt, A.; Grätzel, M.; Rech, B.: Monolithic Perovskite/Silicon Tandem Solar Cells. In: Hardo Bruhns [Ed.] : Energie - Forschung und PerspektivenDeutsche Physikalische Gesellschaft, 2016. - ISBN 978-3-9818197-0-0, p. 69-82
    http://www.fze.uni-saarland.de/AKE_Archiv/DPG2016-AKE_Regensburg/Buch/DPG2016-Regensburg_Tagungsband_142p.pdf

  • Eisenhauer, D.; Jäger, K.; Köppel, G.; Rech, B.; Becker, C.: Optical properties of smooth anti-reflective three-dimensional textures for silicon thin-film solar cells. Energy Procedia 102 (2016), p. 27-35

  • Eisenhauer, D.; Köppel, G.; Jäger, K.; Rech, B.; Becker, C.: Imprinted Nanostructures for Light Management in Crystalline Silicon Thin-Film Solar Cells on Glass. In: Optical Nanostructures and Advanced Materials for Photovoltaics 2016, Leipzig, Germany, 14–17 November 2016 In: Light, Energy and the Environment, OSAOptical Society of America, 2016. - ISBN 978-0-9600380-4-6, p. PM2B.5/1-3

  • Jaeger, K.; Hammerschmidt, M.; Köppel, G.; Burger, S.; Becker, C.: On accurate simulations of thin-film solar cells with a thick glass superstrate. In: Optical Nanostructures and Advanced Materials for Photovoltaics. In Proceedings Light, Energy and the Environment Part of Light, Energy and the Environment, 14–17 November 2016, Leipzig, GermanyOptical Society of America, 2016. - ISBN 978-0-9600380-4-6, p. PM3B.5/1-3

  • Jäger, K.; Barth, C.; Hammerschmidt, M.; Herrmann, S.; Burger, S.; Schmidt, F.; Becker, C.: Simulations of sinusoidal nanotextures for coupling light into c-Si thin-film solar cells. Optics Express 24 (2016), p. A569-A580

  • Jäger, K.; Köppel, G.; Barth, C.; Hammerschmidt, M.; Herrmann, S.; Burger, S.; Schmidt, F.; Becker, C.: Sinusoidal Gratings for Optimized Light Management in c-Si Thin-Film Solar Cells. In: Ralf B. Wehrspohn ... [Ed.] : Photonics for Solar Energy Systems VI : 5-7 April 2016, Brussels, BelgiumBellingham, Washington: SPIE, 2016 (Proceedings of SPIE ; 9898). - ISBN 978-1-5106-0143-7

2015


  • Jäger, K.; Linssen, D.N.P.; Isabella, O.; Zeman, M.: Ambiguities in optical simulations of nanotextured thin-film solar cells using the finite-element method. Optics Express 23 (2015), p. A1060-A1071