Mr Timo Maschwitz
Research fellow
Position Description
Research on additives and crystallization of metall-halide perovskites.
Research on tin-based Perovskite solar cell within the FOXES-Project.
Design and realization of measurement set ups for the characterization solar cells, light emitting diode and Perovskite precursors.
Exercise lecture, practical course und exam of the lecture Materialien und Bauelemente der Elektrotechnik.
Partial maintenance of the website.
Biography
Publications
2025
T. Maschwitz, L. Merten, F. Ünlü, M. Majewski, F. Haddadi Barzoki, Z. Wu, S. D. Öz, C. Kreusel, M. Theisen, P. Wang, M. Schiffer, G. Boccarella, G. Marioth, H. Weidner, S. Schultheis, T. Schieferstein, D. Gidaszewski, Z. Julliev, E. Kneschaurek, V. Munteanu, I. Zaluzhnyy, F. Bertram, A. Jaffrès, J. He, N. Ashurov, M. Stolterfoht, C. M. Wolff, E. Unger, S. Olthof, G. Brocks, S. Tao, H. Grüninger, O. J. J. Ronsin, J. Harting, A. F. Kotthaus, S. F. Kirsch, S. Mathur, A. Hinderhofer, F. Schreiber, T. Riedl and K. O. Brinkmann:
How crystallization additives govern halide perovskite grain growth
Nature Communications, (2025)
K. O. Brinkmann, P. Wang, N. Kalasariya, S. Ozen, S. Öz, S. Opitz, G. Boccarella, S. Ozen, T. Maschwitz, R. Heiderhoff, S. Olthof, F. Lang, M. Stolterfoht, and T. Riedl:
Working principle of integrated perovskite-organic solar cells
ACS Energy Lett. 10, 3178 (2025)
F. Zimmermann, P. Wang, C. Tückmantel, T. Maschwitz, R. Heiderhoff, K. O. Brinkmann, and T. Riedl:
Permeation Barriers Grown by Atomic Layer Deposition Endow Non-Fullerene Organic Solar Cells with Damp-Heat Resilience
ACS Applied Mater. & Interfaces 17, 30924 (2025)
2024
N. Kurahashi, M. Runkel, C. Kreusel, M. Schiffer, T. Maschwitz, T. Kraus, K. O. Brinkmann, R. Heiderhoff, M. Buchmüller, S. O. Schumacher, J. Brunner, D. Rogalla, S. Özen, F. Lang, Y. Vaynzof, P. Görrn, and T. Riedl:
Distributed Feedback Lasing in Thermally Imprinted Phase-Stabilized CsPbI3 Thin Films
Advanced Functional Materials 34, 2405976 (2024)
2022
K. O. Brinkmann, T. Becker, F. Zimmermann, T. Gahlmann, M. Theisen, T. Haeger, S. Olthof, C. Kreusel, M. Günster, T. Maschwitz, F. Göbelsmann, C. Koch, D. Hertel, P. Caprioglio, L. Perdigon, A. Al-Ashouri, L. Merten, A. Hinderhofer, L. Gomell, S. Zhang, F. Schreiber, S. Albrecht, K. Meerholz, D. Neher, M. Stolterfoht, and T. Riedl:
Perovskite - organic tandem solar cells with indium oxide interconnect
Nature 604, 280 (2022)., DOI: 10.1038/s41586-022-04455-0.
2021
T. Gahlmann, T. Tschorn, T. Maschwitz, L. Gomell, T. Haeger, G. Grötsch, R. Heiderhoff, and T. Riedl:
Bi-facial Color-Tunable Electroluminescent Devices
ACS Applied Mater. & Interfaces 13, 28514 (2021).
Conference Contributions
2025
F. Zimmermann, P. Wang, C. Tückmantel, T. Maschwitz, R. Heiderhoff, K. O. Brinkmann, T. Riedl:
Sustainable Energy Solutions for IoT: Low-Temperature, Low-Cost Thin-Film Organic Solar Cells
(Poster) tec2zero: Technology Towards Zero-Waste and Zero-Carbon, Wuppertal, September 2025
T. Maschwitz, L. Merten, F. Ünlü, M. Majewski, F. H. Barzoki, Z. Wu, S. D. Öz, S. Olthof, S. Tao, H. Grüninger, O. J. J. Ronsin, J. Harting, A. Kotthaus, S. Kirsch, S. Marthur, A. Hinderhofer, F. Schreiber, T. Riedl, K. O. Brinkmann:
The Impact of Additives in Halide Perovskite Grain Growth
(Vortrag) Nature Conference: Advancing Perovskite-Based Photovoltaics, Stuttgart, September 2025
T. Maschwitz, L. Merten, F. Ünlü, M. Majewski, F. Barzoki, Z. Wu, S. D. Öz, C. Kreusel, M. Theisen, P. Wang, M. Schiffer, G. Boccarella, H. Weidner, S. Schultheis, G. Marioth, Z. Julliev, E. Kneschaurek, V. Munteanu, I. Zaluzhnyy, F. Bertram, A. Jaffres, J. He, N. Ashurov, M. Stolterfoht, C. Wolff, E. Unger, S. Tao, S. Olthof, H. Grüninger, O. Ronsin, J. Harting, A. Kotthaus, S. Kirsch, S. Mathur, A. Hinderhofer, F. Schreiber, K. O. Brinkmann, T. Riedl:
Understanding how Crystallization Additives Govern Halide Perovskite Grain Growth
(Vortrag) NanoGe: PerFunPro, Konstanz, September 2025
T. Maschwitz, S. Schultheis, G. Marioth, K. O. Brinkmann, T. Riedl:
Probing Perovskite Precursor Inks by Electrical Impedance Spectroscopy
(Poster) NanoGe: PerFunPro, Konstanz, September 2025
2023
Timo Maschwitz, Lena Merten, Feray Ünlü, Andreas Kotthaus, Cedric Kreusel, Manuel Theisen, Henrik Weidner, Dawid Gidaszewski, Ekaterina Kneschaurek, Jaffrès Anaël Morgane, Alexander Hinderhofer, Adriana Creatore, Junjie He, Christian Wolff, Stefan F. Kirsch, Eva Unger, Sanjay Mathur, Frank Schreiber, Kai O. Brinkmann, Thomas Riedl:
"Lead Complexes and Perovskite Formation – a Holistic Approach to Find the Missing Link",
(talk) PSCO 2023, Oxford (Great Britain), OP3A.10 (2023)
2022
K. O. Brinkmann, T. Becker, F. Zimmermann, C. Kreusel, T. Gahlmann, M. Theisen, T. Haeger, S. Olthof, C. Tückmantel, M. Günster, T. Maschwitz, F. Göbelsmann, C. Koch, D. Hertel, P. Caprioglio, J. Thiesbrummel, F. Peña‑Camargo, L. Perdigón-Toro, A. Al-Ashouri, L. Merten, A. Hinderhofer, L. Gomell, S. Zhang, H. Snaith, F. Schreiber, S. Albrecht, K. Meerholz, D. Neher, M. Stolterfoht and T. Riedl:
"Universal Lossless Interconnect for Perovskite-Organic and All-Perovskite Tandem Solar Cells.",
(talk) MRS Fall Meeting, Boston (USA), on-site, EN02.09.07 (2022).
K. O. Brinkmann, T. Becker, F. Zimmermann, C. Kreusel, T. Gahlmann, M. Theisen, T. Haeger, S. Olthof, C. Tückmantel, M. Günster, T. Maschwitz, F. Göbelsmann, C. Koch, D. Hertel, P. Caprioglio, J. Thiesbrummel, F. Peña‑Camargo, L. Perdigón-Toro, A. Al-Ashouri, L. Merten, A. Hinderhofer, L. Gomell, S. Zhang, H. Snaith, F. Schreiber, S. Albrecht, K. Meerholz, D. Neher, M. Stolterfoht and T. Riedl:
"One for All: Perovskite-Organic and All-Perovskite Tandem Solar Cells Enabled by a Lossless Indium Oxide Interconnect.",
(poster) IPS23 Lausanne (Switzerland), on-site (2022)
K. O. Brinkmann, T. Becker, F. Zimmermann, C. Kreusel, T. Gahlmann, M. Theisen, T. Haeger, S. Olthof, C. Tückmantel, M. Günster, T. Maschwitz, F. Göbelsmann, C. Koch, D. Hertel, P. Caprioglio, F. Peña‑Camargo, L. Perdigón-Toro, A. Al-Ashouri, L. Merten, A. Hinderhofer, L. Gomell, S. Zhang, F. Schreiber, S. Albrecht, K. Meerholz, D. Neher, M. Stolterfoht and T. Riedl:
"Perovskite/Organic Tandem Solar Cells reaching 24% - Circumventing Tin Perovskites",
(talk) TandemPV International Workshop, Freiburg (Germany), on-site (2022)
2021
K. O. Brinkmann, T. Becker, F. Zimmermann, C. Kreusel, T. Gahlmann, M. Theisen, T. Haeger, S. Olthof, M. Günster, T. Maschwitz, F. Göbelsmann, C. Koch, D. Hertel, P. Caprioglio, L. Perdigon, L. Merten, A. Hinderhofer, A. Al-Ashouri, L. Gomell, F. Schreiber, S. Albrecht, K. Meerholz, D. Neher, M. Stolterfoht, and T. Riedl:
"No Need for Tin - Perovskite/Organic Tandem Solar Cells Approaching 24%",
(talk) MRS Fall Meeting, Boston (USA), EN05.03.01 (2021).
Miscellaneous
Consultations by appointment.
