Publications

Z. Y. Ooi, A. Jiménez-Solano, K. Gałkowski, Y. Sun, J. Ferrer Orri, K. Frohna, H. Salway, S. Kahmann, S. Nie, G. Vega, S. Kar, M. P. Nowak, S. Maćkowski, P. Nyga, C. Ducati, N. C. Greenham, B. V. Lotsch, M. Anaya, S. D. Stranks, Strong angular and spectral narrowing of electroluminescence in an integrated Tamm-plasmon-driven halide perovskite LED, Nature Commun., 15, 5802 (2024)
X. Luo, W. Xu, G. Zheng, S. Tammireddy, Q. Wei, M. Karlsson, Z. Zhang, K. Ji, S. Kahmann, C. Yin, Y. Zou, Z. Zhang, H. Chen, L. Marcal, H. Zhao, D. Ma, D. Zhang, Y. Lu, M. Li, C. Deibel, S. D. Stranks, L. Duan, J. Wallentin, W. Huang, F. Gao, Effects of local compositional heterogeneity in mixed halide perovskites on blue electroluminescence , Matter 7, 1 (2024)
Y. Zou, X. Bai, S. Kahmann, L. Dai, S. Yuan, S. Yin, J. E. Heger, M. Schwartzkopf, S. V. Roth, C.-C. Chen, J. Zhang, S. D. Stranks, R. H. Friend, and P. Müller-Buschbaum, A Practical Approach Toward Highly Reproducible andHigh-Quality Perovskite Films Based on an Aging Treatment, Adv. Mater. 36, 2307024 (2024)

K. W. P. Orr, J. Diao, M. N. Lintangpradipto, D. J. Batey, A. N. Iqbal, S. Kahmann, K. Frohna, M. Dubajic, S. J. Zelewski, A. E. Dearle, T. A. Selby, P. Li, T. A. S. Doherty, S. Hofmann, O. M. Bakr, I. K. Robinson, S. D. Stranks, Imaging light-induced migration of dislocations in halide perovskites with 3d nanoscale strain mapping, Adv. Mater. 35, 2305549 (2023)
M. J. Rivera Medina, L. Di Mario, S. Kahmann, J. Xi, G. Portale, G. Bongiovanni, A. Mura, J. C. Alonso Huitrón, M. A. Loi, Tuning the energy transfer in Ruddlesden–Popper perovskites phases through isopropylammonium addition–towards efficient blue emitters, Nanoscale 15, 6673 (2023)
H.-H. Fang, E. K. Tekelenburg, H. Xue, S. Kahmann, L. Chen, S. Adjokatse, G. Brocks, S. Tao, M. A. Loi, Unraveling the Broadband Emission in mixed Tin-Lead Layered Perovskites, Adv. Opt. Mater. 11, 2202038 (2023)

S. Kahmann, H. Duim, A. J. Rommens, K. Frohna, G. H. ten Bring, G. Portale, S. D. Stranks, M. A. Loi, Taking a closer look how the microstructure of Dion-Jacobson perovskites governs their photophysics, J. Mater. Chem. C 10, 17539 (2022). 2023 Emerging Investigators & 2022 JMCC Most Popular Articles
S. Kahmann, D. Meggiolaro, L. Gregori, E. K. Tekelenburg, M. Pitaro, S. D. Stranks, F. De Angelis, M. A. Loi, The origin of broad emission in <100> two-dimensional perovskites: Extrinsic vs. intrinsic processes, ACS Energy Letters 7, 4232 (2022)
O. D. I. Moseley, B. Roose, S. J. Zelewski, S. Kahmann, K. Dey, S. D. Stranks, Tunable multiband halide perovskite tandem photodetectors with switchable response, ACS Photonics 9, 3958 (2022)
C. Cho, S. Feldmann, K. M. Yeom, Y.-W. Jang, S. Kahmann, J.-Y. Huang, T. C.-J. Yang, M. N. T. Khayyat, Y.-R. Wu, M. Choi, J. H. Noh, S. D. Stranks, N. C. Greenham, Efficient vertical charge transport in polycrystalline halide perovskites revealed by four-dimensional tracking of charge carriers, Nature Materials 21, 1388 (2022)
S. Kahmann, Z. Chen, O. Hordiichuk, O. Nazarenko, S. Shao, M. V. Kovalenko, G. R. Blake, S. Tao, M. A. Loi, Compositional Variation in FAPb1-xSnxI3 and Its Impact on the Electronic Structure: A Combined Density Functional Theory and Experimental Study, ACS Appl. Mater. Interfaces 14, 34253 (2022)
D. Bederak, A. Shulga, S. Kahmann, W. Talsma, J. Pelanskis, D. N. Dirin, M. V. Kovalenko, M. A. Loi, Heterostructure from PbS Quantum Dot and Carbon Nanotube Inks for High-Effciency Near-Infrared Light-Emitting Field-Effect Transistors, Adv. Electron. Mater. 2101126, (2022)
J.Warby, F. Zu, S. Zeiske, E. Gutierrez-Partida, L. Frohloff, S. Kahmann, K. Frohna, E. Mosconi, E. Radicchi, F. Lang, S. Shah, F. Peña-Camargo, H. Hempel, T. Unold, N. Koch, A. Armin, F. De Angelis, S. D. Stranks, D. Neher, M. Stolterfoht, Understanding Performance Limiting Interfacial Recombination in pin Perovskite Solar Cells, Adv. Energy Mater. 12, 2103567 (2022)

S. Kahmann, H. Duim, A. J. Rommens, E. K. Tekelenburg, S. Shao, M. A. Loi, Grain-Specic Transitions Determine the Band Edge Luminescence in DionJacobson Type 2D Perovskites, Adv. Opt. Mater. 9, 2100892 (2021)
S. Kahmann, H. Duim, H.-H. Fang, M. Dyksik, S. Adjokatse, M. Rivera Medina, M. Pitaro, P. Plochocka, M. A. Loi, Photophysics of Two-Dimensional Perovskites – Learning from Metal Halide Substitution, Adv. Funct. Mater. 31, 2103778 (2021)
J. Liu, B. Van der Zee, D. R. Villava, G. Ye, S. Kahmann, M. Kamperman, J. Dong, L. Qiu, G. Portale, M. A. Loi, J. C. Hummelen, R. C. Chiechi, D. Baran, L. J. A. Koster, Molecular Doping Directed by a Neutral Radical, ACS Appl. Mater. Interfaces 13, 29858 (2021)
A. Filippetti, S. Kahmann, C. Caddeo, A. Mattoni, M. Saba, A. Bosin, M. A. Loi, Fundamentals of tin iodide perovskites: a promising route to highly ecient, lead-free solar cells, J. Mater. Chem. A 9, 11812 (2021)
S. Shao, W. Talsma, M. Pitaro, J. Dong, S. Kahmann, A. J. Rommens, G. Portale, M. A. Loi, Field-Eect Transistors Based on Formamidinium Tin Triiodide Perovskite, Adv. Funct. Mater. 31, 2008478 (2021)
E. K. Tekelenburg, S. Kahmann, M. E. Kamminga, G. R. Blake, M. A. Loi, Elucidating the Structure and Photophysics of Layered Perovskites through Cation Fluorination, Adv. Opt. Mater. 9, 2001647 (2021)
S. Shao, M. Nijenhuis, J. Dong, S. Kahmann, G. H. ten Brink, G. Portale, M. A. Loi, Influence of the stoichiometry of tin-based 2D/3D perovskite active layers on solar cell performance, J. Mater. Chem. A 9, 10095 (2021)

D. Bederak, N. Sukharevska, S. Kahmann, M. Abdu-Aguye, H. Duim, D. N. Dirin, M. V. Kovalenko, G. Portale, M. A. Loi, On the Colloidal Stability of PbS Quantum Dots Capped with Methylammonium Lead Iodide Ligands, ACS Appl. Mater. Interfaces 12, 52959 (2020)
S. Kahmann, M. A. Loi, Trap states in lead chalcogenide colloidal quantum dots – origin, impact, and remedies, Appl. Phys. Rev. 7, 041305 (2020)
B. G. H. M. Groeneveld, H. Duim, S. Kahmann, O. De Luca, E. K. Tekelenburg, M. E. Kamminga, L. Protesescu, G. Portale, G. R. Blake, P. Rudolf, M. A. Loi, Photochromism in Ruddlesden-Popper copper-based perovskites: a light-induced change of coordination number at the surface, J. Mater. Chem. C 8, 15377 (2020)
S. Kahmann, O. Nazarenko, S. Shao, O. Hordiichuk, M. Kepenekian, J. Even, M. V. Kovalenko, G. R. Blake, M. A. Loi, Negative Thermal Quenching in FASnI3 Perovskite Single Crystals and Thin Films, ACS Energy Lett. 5, 2512 (2020)
S. Kahmann, E. K. Tekelenburg, H. Duim, M. E. Kamminga, M. A. Loi, Extrinsic nature of the broad photoluminescence in lead iodide-based Ruddlesden-Popper perovskites, Nature Commun. 11, 2344 (2020)
J. Dong, S. Shao, S. Kahmann, A. J. Rommens, D. Hermida-Merino, G. H. ten Brink, M. A. Loi, G. Portale, Mechanism of Crystal Formation in Ruddlesden-Popper Sn-Based Perovskites, Adv. Funct. Mater. 30, 2001294 (2020)
I. van de Riet, H.-H. Fang, S. Adjokatse, S. Kahmann, M. A. Loi, Influence of morphology on photoluminescence properties of methylammonium lead tribromide films, J. Lumin. 220, 117033 (2020)
H. Duim, S. Adjokatse, S. Kahmann, G. H. ten Brink, M. A. Loi, The Impact of Stoichiometry on the Photophysical Properties of Ruddlesden-Popper Perovskites, Adv. Funct. Mater. 30, 1907505 (2020)

M. Abdu-Aguye, D. Bederak, S. Kahmann, N. Killilea, M. Sytnyk, W. Heiss, M. A. Loi, Photophysical and electronic properties of bismuth-perovskite shelled lead sulde quantum dots, J. Chem. Phys. 151, 214702 (2019)
G. Demirel, R. L. M. Gieseking, R. Ozdemir, S. Kahmann, M. A. Loi, G. C. Schatz, A. Facchetti, H. Usta, Molecular engineering of organic semiconductors enables noble metal-comparable SERS enhancement and sensitivity, Nat. Commun. 10, 5502 (2019)
R. Sun, J. Guo, Q. Wu, Z. Zhang, W. Yang, J. Guo, M. Shi, Y. Zhang, S. Kahmann, L. Ye, X. Jiao, M. A. Loi, Q. Shen, H. Ade, W. Tang, C. J. Brabec, J. Min, A multi-objective optimization-based layer-by-layer blade-coating approach for organic solar cells: rational control of vertical stratication for high performance, Energy Environ. Sci. 12, 3118 (2019)
S. Kahmann, A. Shulga, M. A. Loi, Quantum Dot Light-Emitting Transistors – Powerful Research Tools and Their Future Applications, Adv. Funct. Mater. 30, 1904174 (2020)
S. Kahmann, S. Shao, M. A. Loi, Cooling, Scattering, and Recombination – The Role of the Material Quality for the Physics of Tin Halide Perovskites, Adv. Funct. Mater. 29, 1902963 (2019)
S. Adjokatse, S. Kahmann, H. Duim, M. A. Loi, Eects of strontium doping on the morphological, structural, and photophysical properties of FASnI3 perovskite thin films, APL Materials 7, 031116 (2019)
N. Gasparini, S. Kahmann, M. Salvador, J. D. Perea, A. Sperlich, A. Baumann, N. Li, S. Rechberger, E. Spiecker, V. Dyakonov, G. Portale, M. A. Loi, C. J. Brabec, T. Ameri, Favorable Mixing Thermodynamics in Ternary Polymer Blends for Realizing High Eciency Plastic Solar Cells, Adv. Energy Mater. 9, 1803394 (2019)
S. Kahmann, M. A. Loi, Hot carrier solar cells and the potential of perovskites for breaking the Shockley-Queisser limit, J. Mater. Chem. C 7, 2471 (2019)
A. Classen, L. Einsiedler, T. Heumueller, A. Graf, M. Brohmann, F. Berger, S. Kahmann, M. Richter, G. J. Matt, K. Forberich, J. Zaumseil, C. J. Brabec, Absence of Charge Transfer State Enables Very Low VOC Losses in SWCNT:Fullerene Solar Cells, Adv. Energy Mater. 9, 1801913 (2019)

A. G. Shulga, S. Kahmann, D. N. Dirin, A. Graf, J. Zaumseil, M. V. Kovalenko, M. A. Loi, Electroluminescence Generation in PbS Quantum Dot Light-Emitting Field-Eect Transistors with Solid-State Gating, ACS Nano 12, 12805 (2018)
S. Kahmann, W. Gomulya, M. A. Loi, A. Mura, Donor-acceptor photoexcitation dynamics in organic blends investigated with a high sensitivity pump-probe system, J. Mater. Chem. C 6, 10822 (2018)
S. Kahmann, M. A. Loi, C. J. Brabec, Delocalisation softens polaron electronic transitions and vibrational modes in conjugated polymers, J. Mater. Chem. C 6, 6008 (2018)
S. Kahmann, M. Sytnyk, N. Schrenker, G. J. Matt, E. Spiecker, W. Heiss, C. J. Brabec, M. A. Loi, Revealing Trap States in Lead Sulphide Colloidal Quantum Dots by Photoinduced Absorption Spectroscopy, Adv. Electron. Mater. 4, 1700348 (2018)

S. Kahmann, J. M. Salazar Rios, M. Zink, S. Allard, U. Scherf, M. C. dos Santos, C. J. Brabec, M. A. Loi, Excited-State Interaction of Semiconducting Single-Walled Carbon Nanotubes with Their Wrapping Polymers, J. Phys. Chem. Lett. 8, 5666 (2017)

S. Kahmann, D. Fazzi, G. J. Matt, W. Thiel, M. A. Loi, C. J. Brabec, Polarons in Narrow Band Gap Polymers Probed over the Entire Infrared Range: A Joint Experimental and Theoretical Investigation, J. Phys. Chem. Lett. 7, 4438 (2016)
S. Chen, Y. Hou, H. Chen, M. Richter, F. Guo, S. Kahmann, X. Tang, T. Stubhan, H. Zhang, N. Li, N. Gasparini, C. O. Ramirez Quiroz, L. S. Khanzada, G. J. Matt, A. Osvet, C. J. Brabec, Exploring the Limiting Open-Circuit Voltage and the Voltage Loss Mechanism in Planar CH3NH3PbBr3 Perovskite Solar Cells, Adv. Energy Mater. 6, 1600132 (2016)
X. Tang, M. Brandl, B. May, I. Levchuk, Y. Hou, M. Richter, H. Chen, S. Chen, S. Kahmann, A. Osvet, F. Maier, H.-P. Steinrück, R. Hock, G. J. Matt, C. J. Brabec, Photoinduced degradation of methylammonium lead triiodide perovskite semiconductors, J. Mater. Chem. A 4, 15896 (2016)
H. Chen, Y. Hou, C. E. Halbig, S. Chen, H. Zhang, N. Li, F. Guo, X. Tang, N. Gasparini, I. Levchuk, S. Kahmann, C. O. Ramirez Quiroz, A. Osvet, S. Eigler, C. J. Brabec, Extending the environmental lifetime of unpackaged perovskite solar cells through interfacial design, J. Mater. Chem. A 4, 11604 (2016)

S. Kahmann, A. Mura, L. Protesescu, M. V. Kovalenko, C. J. Brabec, M. A. Loi, Optoelectronics of PbS quantum dot and narrow bandgap polymer blends, J. Mater. Chem. C 3, 5499 (2015)

B. Beyer, D. Griese, C. Schirrmann, R. Pfeifer, S. Kahmann, O. R. Hild, K. Leo, Small molecule bulk heterojunction organic solar cells with coumarin-6 as donor material, Thin Solid Films 536, (2013)