Time-resolved Element-selective Probing of Charge Carriers in Solar Materials

Authors

  • James Budarz Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland
  • Thomas Rossi Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland
  • Dominik Kinschel Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland
  • Jochen Rittmann SwissFEL, Paul Scherrer Institut CH-5232 Villigen PSI, Switzerland
  • Daniel Grolimund Swiss Light Source, Paul Scherrer Institut CH-5232 Villigen PSI, Switzerland
  • Thomas Huthwelker Swiss Light Source, Paul Scherrer Institut CH-5232 Villigen PSI, Switzerland
  • Chris J. Milne SwissFEL, Paul Scherrer Institut CH-5232 Villigen PSI, Switzerland
  • M. Hannelore Rittmann-Frank Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland
  • Fabio G. Santomauro Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland
  • Majed Chergui Ecole Polytechnique Fédérale de Lausanne Laboratoire de Spectroscopie Ultrarapide (LSU) and Lausanne Centre for Ultrafast Science (LACUS) ISIC, FSB, CH-1015 Lausanne, Switzerland. Majed.chergui@epfl.ch

DOI:

https://doi.org/10.2533/chimia.2017.768

Keywords:

Perovskites, Solar materials, Tio2, Ultrafast, X-ray absorption spectroscopy

Abstract

We review our recent results on the implementation of picosecond (ps) X-ray absorption spectroscopy to probe the electronic and geometric structure of centres formed by photoexcitation of solar materials such as TiO2 polymorphs and inorganic Cs-based perovskites. The results show electron localization at Ti defects in TiO2 anatase and rutile and small hole polaron formation in the valence band of CsPbBr3, all within 80 ps. This method is promising for the study of the ultrafast time scales of such processes, especially with the advent of the Swiss X-ray Free Electron Laser (SwissFEL).
CHIMIA Vol. 71 No. 11(2017): Perovskites

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Published

2017-11-29

Issue

Vol. 71 No. 11 (2017): Perovskites

Section

Scientific Articles

License

Copyright (c) 2017 Swiss Chemical Society

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

[1]
J. Budarz, T. Rossi, D. Kinschel, J. Rittmann, D. Grolimund, T. Huthwelker, C. J. Milne, M. H. Rittmann-Frank, F. G. Santomauro, M. Chergui, Chimia 2017, 71, 768, DOI: 10.2533/chimia.2017.768.