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Title: Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites

Abstract

Excitation localization involving dynamic nanoscale distortions is a central aspect of photocatalysis, quantum materials and molecular optoelectronics. Experimental characterization of such distortions requires techniques sensitive to the formation of point-defect-like local structural rearrangements in real time. Here, we visualize excitation-induced strain fields in a prototypical member of the lead halide perovskites via femtosecond resolution diffuse X-ray scattering measurements. Here, this enables momentum-resolved phonon spectroscopy of the locally distorted structure and reveals radially expanding nanometre-scale strain fields associated with the formation and relaxation of polarons in photoexcited perovskites. Quantitative estimates of the magnitude and shape of this polaronic distortion are obtained, providing direct insights into the dynamic structural distortions that occur in these materials. Optical pump–probe reflection spectroscopy corroborates these results and shows how these large polaronic distortions transiently modify the carrier effective mass, providing a unified picture of the coupled structural and electronic dynamics that underlie the optoelectronic functionality of the hybrid perovskites.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [3]; ORCiD logo [3];  [5];  [5];  [6];  [5]; ORCiD logo [5];  [5];  [5];  [7]; ORCiD logo [5];  [8]; ORCiD logo [7]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Univ. of Cambridge (United Kingdom); Aarhus Univ. (Denmark)
  3. Univ. of Cambridge (United Kingdom)
  4. Stanford Univ., CA (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States); Paderborn Univ. (Germany)
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  8. Univ. of Cambridge (United Kingdom); Technical Univ. of Munich, Garching (Germany)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
OSTI Identifier:
1767932
Alternate Identifier(s):
OSTI ID: 1784952; OSTI ID: 1837052
Grant/Contract Number:  
AC02-76SF00515; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Journal ID: ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic properties and materials; Materials for energy and catalysis; Solar cells; Structural properties; Structure of solids and liquids

Citation Formats

Guzelturk, Burak, Winkler, Thomas, Van de Goor, Tim J., Smith, Matthew D., Bourelle, Sean A., Feldmann, Sascha, Trigo, Mariano, Teitelbaum, Samuel W., Steinrück, Hans-Georg, de la Pena, Gilberto A., Alonso-Mori, Roberto, Zhu, Diling, Sato, Takahiro, Karunadasa, Hemamala I., Toney, Michael F., Deschler, Felix, and Lindenberg, Aaron M. Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites. United States: N. p., 2021. Web. doi:10.1038/s41563-020-00865-5.
Guzelturk, Burak, Winkler, Thomas, Van de Goor, Tim J., Smith, Matthew D., Bourelle, Sean A., Feldmann, Sascha, Trigo, Mariano, Teitelbaum, Samuel W., Steinrück, Hans-Georg, de la Pena, Gilberto A., Alonso-Mori, Roberto, Zhu, Diling, Sato, Takahiro, Karunadasa, Hemamala I., Toney, Michael F., Deschler, Felix, & Lindenberg, Aaron M. Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites. United States. https://doi.org/10.1038/s41563-020-00865-5
Guzelturk, Burak, Winkler, Thomas, Van de Goor, Tim J., Smith, Matthew D., Bourelle, Sean A., Feldmann, Sascha, Trigo, Mariano, Teitelbaum, Samuel W., Steinrück, Hans-Georg, de la Pena, Gilberto A., Alonso-Mori, Roberto, Zhu, Diling, Sato, Takahiro, Karunadasa, Hemamala I., Toney, Michael F., Deschler, Felix, and Lindenberg, Aaron M. Mon . "Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites". United States. https://doi.org/10.1038/s41563-020-00865-5. https://www.osti.gov/servlets/purl/1767932.
@article{osti_1767932,
title = {Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites},
author = {Guzelturk, Burak and Winkler, Thomas and Van de Goor, Tim J. and Smith, Matthew D. and Bourelle, Sean A. and Feldmann, Sascha and Trigo, Mariano and Teitelbaum, Samuel W. and Steinrück, Hans-Georg and de la Pena, Gilberto A. and Alonso-Mori, Roberto and Zhu, Diling and Sato, Takahiro and Karunadasa, Hemamala I. and Toney, Michael F. and Deschler, Felix and Lindenberg, Aaron M.},
abstractNote = {Excitation localization involving dynamic nanoscale distortions is a central aspect of photocatalysis, quantum materials and molecular optoelectronics. Experimental characterization of such distortions requires techniques sensitive to the formation of point-defect-like local structural rearrangements in real time. Here, we visualize excitation-induced strain fields in a prototypical member of the lead halide perovskites via femtosecond resolution diffuse X-ray scattering measurements. Here, this enables momentum-resolved phonon spectroscopy of the locally distorted structure and reveals radially expanding nanometre-scale strain fields associated with the formation and relaxation of polarons in photoexcited perovskites. Quantitative estimates of the magnitude and shape of this polaronic distortion are obtained, providing direct insights into the dynamic structural distortions that occur in these materials. Optical pump–probe reflection spectroscopy corroborates these results and shows how these large polaronic distortions transiently modify the carrier effective mass, providing a unified picture of the coupled structural and electronic dynamics that underlie the optoelectronic functionality of the hybrid perovskites.},
doi = {10.1038/s41563-020-00865-5},
journal = {Nature Materials},
number = 5,
volume = 20,
place = {United States},
year = {Mon Jan 04 00:00:00 EST 2021},
month = {Mon Jan 04 00:00:00 EST 2021}
}

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