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

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, 2108392 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…
  • Wright, Adam D.; Buizza, Leonardo R. V.; Savill, Kimberley J.; Longo, Giulia; Snaith, Henry J.; Johnston, Michael B.; Herz, Laura M.: Ultrafast Excited-State Localization in Cs2AgBiBr6 Double Perovskite. The Journal of Physical Chemistry Letters 12 (13), 2021, 3352-3360 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…