• 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

2021


Becker, C.; Jäger, K.; Burger, S.: Nanophotonics for Solar Energy. Solar Energy Materials and Solar Cells 221 (2021), p. 110916/1


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

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 2020. Optical Society of America, 2020. - ISBN 978-1-943580-79-8, p. PvTh1G.3/1-2


Jäger, R.; Teppor, P.; Härk, E.; Härmas, M.; Adamson, A.; Paalo, M.; Volobujeva, O.; Kikas, A.; Kochovski, Z.; Romann, T.; Harmas, R.; Lust, E.: Cobalt and Nitrogen Co-Doped Peat Derived Carbon Based Catalysts for Oxygen Reduction. ECS Transactions 97 (2020), p. 605-613


Teppor, P.; Jäger, R.; Härk, E.; Sepp, S.; Kook, M.; Volobujeva, O.; Paiste, P.; Kochovski, Z.; Tallo, I.; Lust, E.: Exploring Different Synthesis Parameters for the Preparation of Metal-Nitrogen-Carbon Type Oxygen Reduction Catalysts. Journal of The Electrochemical Society 167 (2020), p. 054513/1-11


Teppor, P.; Jäger, R.; Paalo, M.; Palm, R.; Volobujeva, O.; Härk, E.; Kochovski, Z.; Romann, T.; Härmas, R.; Aruväli, J.; Kikas, A.; Lust, E.: Peat-derived carbon-based non-platinum group metal type catalyst for oxygen reduction and evolution reactions. Electrochemistry Communications 113 (2020), p. 106700/1-7


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 States. Optical 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 Exhibition. München: 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


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


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 2018. Optical Society of America, 2018. - ISBN 978-1-943580-47-7, p. OTC5C.5/1-2


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.; 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


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 States. Bellingham, Washington, USA: SPIE, 2017 (Proceedings of SPIE ; 10356). - ISBN 978-1-5106-1169-6, p. 103560F/1-7


Jäger, R.; Härk, E.; Kasatkin, P.; Pikma, P.; Joost, U.; Paiste, P.; Aruväli, J.; Kallio, T.; Jiang, H.; Lust, E.: Carbide Derived Carbon Supported Pt Nanoparticles with Optimum Size and Amount for Efficient Oxygen Reduction Reaction Kinetics. Journal of The Electrochemical Society 164 (2017), p. F448-F453

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 Perspektiven. Deutsche 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, OSA. Optical 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, Germany. Optical 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, Belgium. Bellingham, 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