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Technical University of Munich
Technical University of Munich

Optoelectronic Properties of Perovskite Semiconductors

The Focus Group is led by Hans Fischer Senior Fellow Professor Laura Herz (University of Oxford) and her hosts, Rudolf Mößbauer Tenure Track Professor David Egger (TUM) and Professor Thomas Bein (LMU).

Perovskite semiconductors are among the most promising energy materials for new generations of low-cost, highly efficient technological devices such as solar cells and light-emitting diodes. This Focus Group investigates the physical and chemical phenomena that underlie the spectacular optoelectronic properties of perovskite and perovskite-like materials. These include the transport of electric and ionic charge, optical properties, and vibrational characteristics. The goal of the Focus Group is to propose novel perovskite and perovskite-like material compositions that show improved properties, e.g., enhanced stability or reduced toxicity. To this end, the research approach combines a variety of tools from optical spectroscopy, microscopic theory, and material synthesis.

Prof. Herz has been awarded a TUM-IAS­@e-conversion Hans Fischer Senior Fellowship.

TUM-IAS funded postdoctoral researcher:
Dr. Sebastian Caicedo Davila, Theory of Functional Energy Materials

Publications by the Focus Group

2023

  • Boland, Jessica L.; Damry, Djamshid A.; Xia, Chelsea Q.; Schönherr, Piet; Prabhakaran, Dharmalingam; Herz, Laura M.; Hesjedal, Thorsten; Johnston, Michael B.: Narrowband, Angle-Tunable, Helicity-Dependent Terahertz Emission from Nanowires of the Topological Dirac Semimetal Cd<sub>3</sub>As<sub>2</sub>. ACS Photonics 10 (5), 2023, 1473-1484 more…
  • Elmestekawy, Karim A.; Gallant, Benjamin M.; Wright, Adam D.; Holzhey, Philippe; Noel, Nakita K.; Johnston, Michael B.; Snaith, Henry J.; Herz, Laura M.: Photovoltaic Performance of FAPbI<sub>3</sub> Perovskite Is Hampered by Intrinsic Quantum Confinement. ACS Energy Letters 8 (6), 2023, 2543-2551 more…
  • Jia, Zhenglin; Righetto, Marcello; Yang, Yujie; Xia, Chelsea Q.; Li, Yanyan; Li, Ruiming; Li, Yuwei; Yu, Bin; Liu, Yong; Huang, Huiming; Johnston, Michael B.; Herz, Laura M.; Lin, Qianqian: Charge-Carrier Dynamics of Solution-Processed Antimony- and Bismuth-Based Chalcogenide Thin Films. ACS Energy Letters 8 (3), 2023, 1485-1492 more…
  • Lal, Snigdha; Righetto, Marcello; Ulatowski, Aleksander M.; Motti, Silvia G.; Sun, Zhuotong; MacManus-Driscoll, Judith L.; Hoye, Robert L. Z.; Herz, Laura M.: Bandlike Transport and Charge-Carrier Dynamics in BiOI Films. The Journal of Physical Chemistry Letters 14 (29), 2023, 6620-6629 more…
  • Motti, Silvia G.; Kober‐Czerny, Manuel; Righetto, Marcello; Holzhey, Philippe; Smith, Joel; Kraus, Hans; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.: Exciton Formation Dynamics and Band‐Like Free Charge‐Carrier Transport in 2D Metal Halide Perovskite Semiconductors. Advanced Functional Materials 33 (32), 2023 more…
  • Righetto, Marcello; Caicedo-Dávila, Sebastián; Sirtl, Maximilian T.; Lim, Vincent J.-Y.; Patel, Jay B.; Egger, David A.; Bein, Thomas; Herz, Laura M.: Alloying Effects on Charge-Carrier Transport in Silver–Bismuth Double Perovskites. The Journal of Physical Chemistry Letters 14 (46), 2023, 10340-10347 more…
  • Righetto, Marcello; Wang, Yongjie; Elmestekawy, Karim A.; Xia, Chelsea Q.; Johnston, Michael B.; Konstantatos, Gerasimos; Herz, Laura M.: Cation‐Disorder Engineering Promotes Efficient Charge‐Carrier Transport in AgBiS<sub>2</sub> Nanocrystal Films. Advanced Materials 35 (48), 2023 more…
  • Rothmann, Mathias Uller; Lohmann, Kilian B.; Borchert, Juliane; Johnston, Michael B.; McKenna, Keith P.; Herz, Laura M.; Nellist, Peter D.: Atomistic Understanding of the Coherent Interface Between Lead Iodide Perovskite and Lead Iodide. Advanced Materials Interfaces 10 (28), 2023 more…
  • Sebastiá-Luna, Paz; Rodkey, Nathan; Mirza, Adeem Saeed; Mertens, Sigurd; Lal, Snigdha; Gaona Carranza, Axel Melchor; Calbo, Joaquín; Righetto, Marcello; Sessolo, Michele; Herz, Laura M.; Vandewal, Koen; Ortí, Enrique; Morales-Masis, Mónica; Bolink, Henk J.; Palazon, Francisco: Chalcohalide Antiperovskite Thin Films with Visible Light Absorption and High Charge-Carrier Mobility Processed by Solvent-Free and Low-Temperature Methods. Chemistry of Materials 35 (16), 2023, 6482-6490 more…
  • Shen, Xinyi; Gallant, Benjamin M.; Holzhey, Philippe; Smith, Joel A.; Elmestekawy, Karim A.; Yuan, Zhongcheng; Rathnayake, P. V. G. M.; Bernardi, Stefano; Dasgupta, Akash; Kasparavicius, Ernestas; Malinauskas, Tadas; Caprioglio, Pietro; Shargaieva, Oleksandra; Lin, Yen‐Hung; McCarthy, Melissa M.; Unger, Eva; Getautis, Vytautas; Widmer‐Cooper, Asaph; Herz, Laura M.; Snaith, Henry J.: Chloride‐Based Additive Engineering for Efficient and Stable Wide‐Bandgap Perovskite Solar Cells. Advanced Materials 35 (30), 2023 more…
  • Ulatowski, Aleksander M.; Elmestekawy, Karim A.; Patel, Jay B.; Noel, Nakita K.; Yan, Siyu; Kraus, Hans; Huggard, Peter G.; Johnston, Michael B.; Herz, Laura M.: Contrasting Charge‐Carrier Dynamics across Key Metal‐Halide Perovskite Compositions through In Situ Simultaneous Probes. Advanced Functional Materials 33 (51), 2023 more…
  • Wright, Adam D.; Patel, Jay. B.; Johnston, Michael B.; Herz, Laura M.: Temperature‐Dependent Reversal of Phase Segregation in Mixed‐Halide Perovskites. Advanced Materials 35 (19), 2023 more…
  • Yan, Siyu; Patel, Jay B.; Lee, Jae Eun; Elmestekawy, Karim A.; Ratnasingham, Sinclair R.; Yuan, Qimu; Herz, Laura M.; Noel, Nakita K.; Johnston, Michael B.: A Templating Approach to Controlling the Growth of Coevaporated Halide Perovskites. ACS Energy Letters 8 (10), 2023, 4008-4015 more…

2022

  • Chen, Yinan; Motti, Silvia G.; Oliver, Robert D. J.; Wright, Adam D.; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.; Filip, Marina R.: Optoelectronic Properties of Mixed Iodide–Bromide Perovskites from First-Principles Computational Modeling and Experiment. The Journal of Physical Chemistry Letters 13 (18), 2022, 4184-4192 more…
  • Elmestekawy, Karim A.; Wright, Adam D.; Lohmann, Kilian B.; Borchert, Juliane; Johnston, Michael B.; Herz, Laura M.: Controlling Intrinsic Quantum Confinement in Formamidinium Lead Triiodide Perovskite through Cs Substitution. ACS Nano 16 (6), 2022, 9640-9650 more…
  • Hooijer, Rik; Bein, Thomas; Biewald, Alexander; Sirtl, Maximilian T.; Malburg, Julian; Holfeuer, Rico; Weis, Andreas; Yousefi Amin, Amir Abbas; Righetto, Marcello; Hartschuh, Achim; Herz, Laura M.; Thamm, Simon: Silver-Bismuth based 2D Double Perovskites (4FPEA)4AgBiX8 (X=Cl, Br, I): Highly Oriented Thin Films with Large Domain Sizes and Ultrafast Charge-Carrier Localization. Proceedings of the International Conference on Hybrid and Organic Photovoltaics, Fundació Scito, 2022 more…
  • Huang, Yi-Teng; Kavanagh, Seán R.; Righetto, Marcello; Rusu, Marin; Levine, Igal; Unold, Thomas; Zelewski, Szymon J.; Sneyd, Alexander J.; Zhang, Kaiwen; Dai, Linjie; Britton, Andrew J.; Ye, Junzhi; Julin, Jaakko; Napari, Mari; Zhang, Zhilong; Xiao, James; Laitinen, Mikko; Torrente-Murciano, Laura; Stranks, Samuel D.; Rao, Akshay; Herz, Laura M.; Scanlon, David O.; Walsh, Aron; Hoye, Robert L. Z.: Strong absorption and ultrafast localisation in NaBiS2 nanocrystals with slow charge-carrier recombination. Nature Communications 13 (1), 2022 more…
  • Lim, Vincent J.‐Y.; Knight, Alexander J.; Oliver, Robert D. J.; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.: Impact of Hole‐Transport Layer and Interface Passivation on Halide Segregation in Mixed‐Halide Perovskites. Advanced Functional Materials 32 (41), 2022, 2204825 more…
  • Lim, Vincent J.‐Y.; Ulatowski, Aleksander M.; Kamaraki, Christina; Klug, Matthew T.; Miranda Perez, Laura; Johnston, Michael B.; Herz, Laura M.: Air‐Degradation Mechanisms in Mixed Lead‐Tin Halide Perovskites for Solar Cells. Advanced Energy Materials, 2022, 2200847 more…
  • Lohmann, Kilian B.; Motti, Silvia G.; Oliver, Robert D. J.; Ramadan, Alexandra J.; Sansom, Harry C.; Yuan, Qimu; Elmestekawy, Karim A.; Patel, Jay B.; Ball, James M.; Herz, Laura M.; Snaith, Henry J.; Johnston, Michael B.: Solvent-Free Method for Defect Reduction and Improved Performance of p-i-n Vapor-Deposited Perovskite Solar Cells. ACS Energy Letters 7 (6), 2022, 1903-1911 more…
  • Oliver, Robert D. J.; Caprioglio, Pietro; Peña-Camargo, Francisco; Buizza, Leonardo R. V.; Zu, Fengshuo; Ramadan, Alexandra J.; Motti, Silvia G.; Mahesh, Suhas; McCarthy, Melissa M.; Warby, Jonathan H.; Lin, Yen-Hung; Koch, Norbert; Albrecht, Steve; Herz, Laura M.; Johnston, Michael B.; Neher, Dieter; Stolterfoht, Martin; Snaith, Henry J.: Understanding and suppressing non-radiative losses in methylammonium-free wide-bandgap perovskite solar cells. Energy &amp; Environmental Science 15 (2), 2022, 714-726 more…
  • Yuan, Qimu; Lohmann, Kilian B.; Oliver, Robert D. J.; Ramadan, Alexandra J.; Yan, Siyu; Ball, James M.; Christoforo, M. Greyson; Noel, Nakita K.; Snaith, Henry J.; Herz, Laura M.; Johnston, Michael B.: Thermally Stable Perovskite Solar Cells by All-Vacuum Deposition. ACS Applied Materials &amp; Interfaces 15 (1), 2022, 772-781 more…
  • Zhou, Yuanyuan; Herz, Laura M.; Jen, Alex K-Y.; Saliba, Michael: Advances and challenges in understanding the microscopic structure–property–performance relationship in perovskite solar cells. Nature Energy 7 (9), 2022, 794-807 more…

2021

  • Buizza, Leonardo R. V.; Herz, Laura M.: Polarons and Charge Localization in Metal‐Halide Semiconductors for Photovoltaic and Light‐Emitting Devices. Advanced Materials 33 (24), 2021, 2007057 more…
  • Buizza, Leonardo R. V.; Sansom, Harry C.; Wright, Adam D.; Ulatowski, Aleksander M.; Johnston, Michael B.; Snaith, Henry J.; Herz, Laura M.: Interplay of Structure, Charge‐Carrier Localization and Dynamics in Copper‐Silver‐Bismuth‐Halide Semiconductors. Advanced Functional Materials 32 (6), 2021 more…
  • Buizza, Leonardo R. V.; Wright, Adam D.; Longo, Giulia; Sansom, Harry C.; Xia, Chelsea Q.; Rosseinsky, Matthew J.; Johnston, Michael B.; Snaith, Henry J.; Herz, Laura M.: Charge-Carrier Mobility and Localization in Semiconducting Cu2AgBiI6 for Photovoltaic Applications. ACS Energy Letters 6 (5), 2021, 1729-1739 more…
  • Motti, Silvia G.; Patel, Jay B.; Oliver, Robert D. J.; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.: Phase segregation in mixed-halide perovskites affects charge-carrier dynamics while preserving mobility. Nature Communications 12 (1), 2021 more…
  • Sansom, Harry C.; Longo, Giulia; Wright, Adam D.; Buizza, Leonardo R. V.; Mahesh, Suhas; Wenger, Bernard; Zanella, Marco; Abdi-Jalebi, Mojtaba; Pitcher, Michael J.; Dyer, Matthew S.; Manning, Troy D.; Friend, Richard H.; Herz, Laura M.; Snaith, Henry J.; Claridge, John B.; Rosseinsky, Matthew J.: Highly Absorbing Lead-Free Semiconductor Cu2AgBiI6 for Photovoltaic Applications from the Quaternary CuI–AgI–BiI3 Phase Space. Journal of the American Chemical Society 143 (10), 2021, 3983-3992 more…
  • Savill, Kimberley J.; Ulatowski, Aleksander M.; Herz, Laura M.: Optoelectronic Properties of Tin–Lead Halide Perovskites. ACS Energy Letters 6 (7), 2021, 2413-2426 more…
  • Schmidt-Mende, Lukas; Dyakonov, Vladimir; Olthof, Selina; Ünlü, Feray; Lê, Khan Moritz Trong; Mathur, Sanjay; Karabanov, Andrei D.; Lupascu, Doru C.; Herz, Laura M.; Hinderhofer, Alexander; Schreiber, Frank; Chernikov, Alexey; Egger, David A.; Shargaieva, Oleksandra; Cocchi, Caterina; Unger, Eva; Saliba, Michael; Byranvand, Mahdi Malekshahi; Kroll, Martin; Nehm, Frederik; Leo, Karl; Redinger, Alex; Höcker, Julian; Kirchartz, Thomas; Warby, Jonathan; Gutierrez-Partida, Emilio; Neher, Dieter; Stolterfoht, Martin; Würfel, Uli; Unmüssig, Moritz; Herterich, Jan; Baretzky, Clemens; Mohanraj, John; Thelakkat, Mukundan; Maheu, Clément; Jaegermann, Wolfram; Mayer, Thomas; Rieger, Janek; Fauster, Thomas; Niesner, Daniel; Yang, Fengjiu; Albrecht, Steve; Riedl, Thomas; Fakharuddin, Azhar; Vasilopoulou, Maria; Vaynzof, Yana; Moia, Davide; Maier, Joachim; Franckevičius, Marius; Gulbinas, Vidmantas et al.: Roadmap on organic–inorganic hybrid perovskite semiconductors and devices. APL Materials 9 (10), 2021, 109202 more…
  • Ulatowski, Aleksander M.; Farrar, Michael D.; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.: Revealing Ultrafast Charge-Carrier Thermalization in Tin-Iodide Perovskites through Novel Pump–Push–Probe Terahertz Spectroscopy. ACS Photonics 8 (8), 2021, 2509-2518 more…
  • Xia, Chelsea Q; Poncé, Samuel; Peng, Jiali; Ulatowski, Aleksander M; Patel, Jay B; Wright, Adam D; Milot, Rebecca L; Kraus, Hans; Lin, Qianqian; Herz, Laura M; Giustino, Feliciano; Johnston, Michael B: Ultrafast photo-induced phonon hardening due to Pauli blocking in MAPbI<sub>3</sub> single-crystal and polycrystalline perovskites. Journal of Physics: Materials 4 (4), 2021, 044017 more…
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