Publications

• T. Czerny, F. Von Toperczer, J. Konietzka, F. Münzer
  “The Role of Edge States for Charge Carrier Separation in n = 1 2D Perovskites”
  ACS Energy Letters 10 (11), 5965–5971 (2025), https://doi.org/10.1021/acsenergylett.5c03352
   
• L. Spee, J. Konietzka, F. Münzer
  “Multilevel Optical Memory with High Responsivity Based on Scalable Graphene/2D Perovskite Heterostructures”
  J. Phys. Chem. Lett. 16 (44), 11566–11574 (2025), https://doi.org/10.1021/acs.jpclett.5c02601
   
• M. O. Valappil, T. Siu, B. Y. Martin, N. D. Wilson, V. Rajakumaran, D. Kanani, J. Konieczny, J. J. Medvedev, J. Ouyang, N. Graddage, R. D. L. Smith, F. Münzer, M. A. Pope
  “Rethinking Electrochemical Exfoliation: Controlled Cathodic Intercalation at Low Overpotentials for High-Quality, Atomically Thin MoS2 Layers without Gas Evolution-Induced Expansion”
  Chem. Mater. 37 (15), 5658–5671 (2025), https://doi.org/10.1021/acs.chemmater.5c00733
   
• L. L. Schaberg, T. Kubiczek, N. Kolluru, S. Santhakumaran, R. Burkard, W. Mertin, F. Muckel, G. Bacher, A. L. Schall-Giesecke, D. Neumaier, E. Kirchner, J. C. Balzer, N. Benson
  “First steps towards a chipless, passive THz-based epidermal electronics concept”
  International Conference on Mobile and Miniaturized Terahertz Systems (ICMMTS) (2025), https://doi.org/10.1109/ICMMTS62835.2025.10925960
   
• J. Bieniek, W. Baek, S. Lorenz, F. Muckel, R. Fainblat, T. Hyeon, G. Bacher
  “Impact of exciton fine structure on the energy transfer in magic-sized (CdSe)₁₃ clusters”
  Nano Res. 17 (12), 10669–10676 (2024), https://doi.org/10.1007/s12274-024-7108-1
   
• L. Spee, J. Konietzka, A. Grundmann, N. Stracke, M. A. Schroer, M. Winterer, H. Kalisch, M. Heuken, A. Vescan, G. Bacher, F. Muckel
  “Photogating through Unidirectional Charge Carrier Funneling in Two-Dimensional Transition Metal Dichalcogenide/Perovskite Heterostructure Photodetectors”
  ACS Applied Optical Materials 5, 852 (2024), https://doi.org/10.1021/acsaom.4c00113
   
• T. E. Czerny, Q. Shen, J. Konieczny, M. Schroer, M. Winterer, F. Muckel
  “Efficient Narrowband Photoconductivity of the Excitonic Resonance in Two-Dimensional Ruddlesden–Popper Perovskites Due to Exciton Polarons”
   J. Phys. Chem. Lett. 14, 4850 (2023), https://doi.org/10.1021/acs.jpclett.3c00710
   
• Y. U. Jin, B. Marler, A. D. Karabanov, K. Winkler, I. C. Jie Yap, A. Dubey, L. Spee, M. Escobar Castillo, F. Muckel, A. N. Salak, N. Benson, D. C. Lupascu
  “Lead-free organic–inorganic azetidinium alternating metal cation bromide: [(CH₂)₃NH₂]₂AgBiBr₆, a perovskite-related absorber”
  RSC advances 51, 36079 (2023), https://doi.org/10.1039/D3RA05966A
   
• F. Muckel, K. N. Guye, S. M. Gallagher, Y. Liu, D. S. Ginger
  “Tuning Hybrid Exciton-Photon Fano Resonances in Two-Dimensional Organic-Inorganic Perovskite Thin Films”
  Nano Letters 21, 6124 (2021), https://doi.org/10.1021/acs.nanolett.1c01504
   
• S. Sanders, G. Simkus, J. Riedel, A. Ost, A. Schmitz, F. Muckel, G. Bacher, M. Heuken, A. Vescan, H. Kalisch
  “Showerhead-assisted Chemical Vapor Deposition of CsPbBr3 films for LED application”
  Journal of Materials Research 36, 1813 (2021), https://doi.org/10.1557/s43578-021-00239-w

Further publications

(Invited) Talks / Conference Contributions

• F. Muckel (invited)
  " Insights into Charge Carrier Separation in 2D Ruddlesden-Popper Perovskite Materials"
  French-Korean-German Workshop 2026 (FKG-2026 Workshop), Busan, South Korea, 14.05.–17.05.2026
   
• F. Muckel
  " Lateral Heterostructures of Electrochemically exfoliated MoS2 and Graphene Flakes via Scalable Langmuir Assembly"
  2026 MRS Spring Meeting & Exhibition, Honolulu, USA, 26.04 – 1.05.2026
   
• F. Muckel
  " Insights into the Role of Edge States for Charge Carrier Separation in n= 1 2D Perovskites"
  2025 MRS Fall Meeting & Exhibition, Boston, USA, 30.11 – 5.12.2025
   
• F. Muckel
  " Scalable Graphene/2D Perovskite Heterostructure for Photoinduced Charge-Trapping Memory with High Responsivity"
  2025 MRS Fall Meeting & Exhibition, Boston, USA, 30.11 – 5.12.2025
   
• F. Muckel
  " Light-Triggered Memory Device with high photoresponsivity based on a Graphene – 2D Perovskite Heterostructure" (Poster)
  Graphene 2025, San Sebastian, Spain, 25.06.–28.06.2025
   
• F. Muckel
  " The Role of Edge States for Charge Carrier Separation in n=1 2D Perovskites"
  Materials for Sustainable Development Conference Spring 2025 (MATSUS25), Sevilla, Spain, 03.03.–7.03.2025
   
• L. Spee, J. Konietzka, A. Grundmann, M. A. Schroer, M. Winterer, M. Heuken, A. Vescan, H. Kalisch, G. Bacher, F. Muckel
  “Photogating through Unidirectional Charge Carrier Funneling in 2D TMDC / 2D Perovskite Heterostructure-Photodetectors”
  2024 MRS Spring Meeting & Exhibition, Seattle, USA, 22.04-26.04.2024
   
• T. Czerny, Q. Shen, J. Konieczny, M. Schroer, M. Winterer, F. Muckel
  "Narrowband Photoconductivity through the Excitonic Resonance in 2D Perovskites" (Poster)
  10. NRW Nano Konferenz – Innovations in Materials and Applications, Dortmund, Germany, 23.05.-24.05.2023
   
• L. Spee, J. Konietzka, A. Grundmann, M. Heuken, H. Kalisch, A. Vescan, F. Muckel
  "Narrowband Photoconductivity through the Excitonic Resonance in 2D Perovskites" (Poster)
  10. NRW Nano Konferenz – Innovations in Materials and Applications, Dortmund, Germany, 23.05.-24.05.2023
   
• F. Muckel (invited)
  " Photoconducting Devices with Specific Attributes based on 2D Metal-Halide Perovskites"
  2023 MRS Spring Meeting & Exhibition, San Francisco, USA, 10.04-14.04.2023
   
• L. Spee, J. Konietzka, A. Grundmann, M. A. Schroer, M. Winterer, M. Heuken, A. Vescan, H. Kalisch, G. Bacher, F. Muckel
  "(Highly Responsive) 2D/2D TMDC/Perovskite Hetero-Photodetectors with Photo-Gating"
  MRS Spring 2023, San Francisco, USA, 10.04.-14.04.2023

Further (invited) Talks and Conference Contributions

Recent Projects and Theses

• R. Ayyad, S. Ravindran
  "Entwicklung eines Photolithografieprozesses zur Herstellung von Kontaktstrukturen für 2D-Photodetektoren"
  Bachelorprojektarbeit Medizintechnik, 27.03.2024
   
• P. May
  "Ortsaufgelöste Photostrommessungen an 2D Perowskit Dünnschichten“
  Bachelorarbeit NanoEngineering,
   
• J. V. Stepien, N. Steinfort
  "Herstellung eines 2D Perowskit/TMDC Photodetektors mit Gate Kontakt"
  Bachelorprojektarbeit NanoEngineering, 24.01.2024
   
• J.Korte, O. Kowollik, T. Smola
  "Optimierung von CsPbBr₃ Metall-Halogenid Perowskit-LED"
  Masterprojektarbeit NanoEngineering, 11.09.2023
   
• U. K. Alirarasan
  "Creating an user interface for spatially resolved luminescence measurements with variable excitation wavelength on a microscope setup“
  Bachelortheses International Studies of Engineering,

Further dissertations, projects and theses

Further Publications

• F. Jiang, J. Pothoof, F. Muckel, R. Giridharagopal, J. Wang, D. Ginger
  “Scanning Kelvin Probe Microscopy Reveals that Ion Motion Varies with Dimensionality in 2D Perovskites”
  ACS Energy Letters 6, 100 (2021), https://dx.doi.org/10.1021/acsenergylett.0c02032
   
• F. Muckel, S. Lorenz, J. Yang, T. A. Nugraha, E. Scalise, T. Hyeon, S. Wippermann, G. Bacher
  "Exciton-driven change of phonon modes causes strong temperature dependent bandgap shift in nanoclusters“
  Nature Communications 11, 4127 (2020),https://doi.org/10.1038/s41467-020-17563-0
   
• R. Fainblat, F. Muckel, G. Bacher
  "Tailoring exchange interactions in magnetically doped II-VI nanocrystals“ in “Chalcogenide - From 3D to 2D and Beyond”
  Elsevier (2020), https://doi.org/10.1016/B978-0-08-102687-8.00014-2
   
• J. Yang*, F. Muckel*, B. K. Choi, S. Lorenz, I. Y. Kim, J. Ackermann, H. Chang, T. Czerney, V. S. Kale, S.-J. Hwang , G. Bacher, T. Hyeon
  "Co²⁺-Doping of Magic-Sized CdSe Clusters: Structural Insights via Ligand Field Transitions“
  Nano Letters 18, 7350 (2018), https://doi.org/10.1021/acs.nanolett.8b03627
   
• F. Muckel*, S. Delikanli*, P. L. Hernández-Martínez, T. Priesner, S. Lorenz, J. Ackermann, M. Sharma, H. V. Demir, G. Bacher
  “sp-d Exchange Interactions in Wave Function Engineered Colloidal CdSe/Mn:CdS Hetero-Nanoplatelets”
  Nano Letters 18, 2047 (2018), https://doi.org/10.1021/acs.nanolett.8b00060
   
• F. Muckel, C. Barrows, A. Graf, A. Schmitz, C. S. Erickson, D. R. Gamelin, G. Bacher
  “Current-Induced Magnetic Polarons in a Colloidal Quantum-Dot device”
  Nano Letters 17, 4768 (2017),  https://doi.org/10.1021/acs.nanolett.7b01496
   
• J. Yang*, F. Muckel*, W. Baek, R. Fainblat, G. Bacher, T. Hyeon
  “Chemical Synthesis, Doping, and Transformation of Magic-Sized Semiconductor Alloy Nanoclusters”
  JACS 139, 6761 (2017), https://doi.org/10.1021/jacs.7b02953
   
• F. Muckel, J. Yang, S. Lorenz, W. Baek, H. Chang, T. Hyeon, G. Bacher, R. Fainblat
  “Digital Doping in Magic-Sized CdSe Clusters”
  ACS Nano 10, 7135 (2016), https://doi.org/10.1021/acsnano.6b03348
   
• J. Yang, R. Fainblat, S. G. Kwon, F. Muckel, J.H. Yu, H. Terlinden, B. H. Kim, D. Iavarone, M. K. Choi, I. Y. Kim, I. Park, H.-K. Hong, J. Lee, J. S. Son, Z. Lee, K. Kang, S.-J. Hwang, G. Bacher, T. Hyeon
  ”Route to the Smallest Doped Semiconductor: Mn²⁺-Doped (CdSe)₁₃ Clusters”
  JACS 137, 12776 (2015), https://doi.org/10.1021/jacs.5b07888
   
• R. Fainblat, F. Muckel, C. Barrows, V. A. Vlaskin, D. R. Gamelin, G. Bacher
  “Valence-Band Mixing Effects in the Upper-Excited-State Magneto-Optical Responses of Colloidal Mn²⁺-Doped CdSe Quantum Dots”
  ACS nano 8, 12699 (2014), https://doi.org/10.1021/nn505610e
   
• R. Fainblat, J. Frohleiks, F. Muckel, J. H. Yu, J. Yang, T. Hyeon, G. Bacher
  “Quantum Confinement-Controlled Exchange Coupling in Manganese(II)-Doped CdSe Two-Dimensional Quantum Well Nanoribbons”
  Nano Letters  12, 5311 (2012), https://doi.org/10.1021/nl302639k
   
• C. Punckt, F. Muckel, S. Wolff, I. Aksay, C. A. Chavarin, G. Bacher, W. Mertin
  “The effect of degree of reduction on the electrical properties”
  APL 102,023114 (2013), https://doi.org/10.1063/1.4775582

Further (Invited) Talks / Conference Contributions

• F. Muckel (invited)
  "Narrowband Photodetection based on Nanostructured Inorganic Materials for Flexible Optoelectronic"
  12th Indo-German Frontiers of Engineering Symposium, Bremen, 29.09.-2.10.2022
   
• F. Muckel, K. N. Guye, S. M. Gallagher, Y. Liu, D. S. Ginger
  "Tuning Fano Resonances in 2D Perovskites using Plasmonic Silver Nanoparticles"
  Unconventional Semiconductors and Their Applications - Gordon Research Conference, Ventura, USA, 12.06.-17.06.2022
   
• T. Czerny, Q. Shen, L. Spee, F. Muckel
  "Wavelength-selective Photoconductivity in 2D Perovskite Material (BA)₂PbI₄ thin film" (Poster)
  Unconventional Semiconductors and Their Applications - Gordon Research Conference, Ventura, USA, 12.06.-17.06.2022
   
• F. Muckel, T. Czerny, Q. Shen
  "2D Perovskites for Wavelength-Selective Photodetectors"
  MRS Spring Meeting 2022, Honolulu, USA, 08.05.-13.05.2022
   
• F. Muckel (invited)
  " 2D Perovskites for Photodetectors and Light-Matter-Interaction"
  Global Conference on Semiconductors, Optoelectronics and Nanostructures, Webinar, 14.-16.04.2022

Further Projects and Theses

• J. F. Konietzka
  "Untersuchung von Ladungsträger-Transfer-Mechanismen in (BA)₂Pbl₄/MoS₂ Photodetektoren"
  Bachelorarbeit, 08.05.2023

• Q. Shen
  "Wellenlängen-abhängiger Photostrom in (BA)₂PbI₄ Schichten mit unterschiedlichen Schichtdicken"
  Bachelorarbeit International Studies of Engineering, 04.07.2022

• J. Konieczny
  "Lichtemittierende Bauelemente basierend auf CsPbBr₃ Metall-Halogenid Perowskitschichten"
  Masterarbeit NanoEngineering, 02.05.2022

• J. F. Konietzka, T. Kramberg
  "Design and optimization of a (BA)₂PbI₄/WS₂ heterostructure for use as a light detector"
  Bachelorprojektarbeit NanoEngineering, 28.01.2022
   
• T. Czerny
  "Photoleitfähigkeit in Perovskit-basierten Schichten unterschiedlicher Dimensionalität"
  Masterarbeit NanoEngineering, 15.02.2021