Visualizing Light-Induced Microstrain and Phase Transition in Lead-Free Perovskites Using Time-Resolved X-Ray Diffraction
(2022) In Journal of the American Chemical Society 144(12). p.5335-5341- Abstract
Metal halide perovskites have emerged as promising materials for optoelectronic applications in the last decade. A large amount of effort has been made to investigate the interplay between the crystalline lattice and photoexcited charge carriers as it is vital to their optoelectronic performance. Among them, ultrafast laser spectroscopy has been intensively utilized to explore the charge carrier dynamics of perovskites, from which the local structural information can only be extracted indirectly. Here, we have applied a time-resolved X-ray diffraction technique to investigate the structural dynamics of prototypical two-dimensional lead-free halide perovskite Cs3Bi2Br9nanoparticles across temporal scales... (More)
Metal halide perovskites have emerged as promising materials for optoelectronic applications in the last decade. A large amount of effort has been made to investigate the interplay between the crystalline lattice and photoexcited charge carriers as it is vital to their optoelectronic performance. Among them, ultrafast laser spectroscopy has been intensively utilized to explore the charge carrier dynamics of perovskites, from which the local structural information can only be extracted indirectly. Here, we have applied a time-resolved X-ray diffraction technique to investigate the structural dynamics of prototypical two-dimensional lead-free halide perovskite Cs3Bi2Br9nanoparticles across temporal scales from 80 ps to microseconds. We observed a quick recoverable (a few ns) photoinduced microstrain up to 0.15% and a long existing lattice expansion (∼a few hundred nanoseconds) at mild laser fluence. Once the laser flux exceeds 1.4 mJ/cm2, the microstrain saturates and the crystalline phase partially transfers into a disordered phase. This photoinduced transient structural change can recover within the nanosecond time scale. These results indicate that photoexcitation of charge carriers couples with lattice distortion, which fundamentally affects the dielectric environment and charge carrier transport.
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- author
- Wang, Yingqi ; Liu, Cunming ; Ren, Yang ; Zuo, Xiaobing ; Canton, Sophie E. LU ; Zheng, Kaibo LU ; Lu, Kuangda ; Lü, Xujie ; Yang, Wenge and Zhang, Xiaoyi
- organization
- publishing date
- 2022-03
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the American Chemical Society
- volume
- 144
- issue
- 12
- pages
- 7 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85127255468
- pmid:35302742
- ISSN
- 0002-7863
- DOI
- 10.1021/jacs.1c11747
- language
- English
- LU publication?
- yes
- id
- 3f618cd3-f202-4c69-9e29-b81c2cac5905
- date added to LUP
- 2022-06-03 14:12:32
- date last changed
- 2024-04-18 14:45:07
@article{3f618cd3-f202-4c69-9e29-b81c2cac5905,
abstract = {{<p>Metal halide perovskites have emerged as promising materials for optoelectronic applications in the last decade. A large amount of effort has been made to investigate the interplay between the crystalline lattice and photoexcited charge carriers as it is vital to their optoelectronic performance. Among them, ultrafast laser spectroscopy has been intensively utilized to explore the charge carrier dynamics of perovskites, from which the local structural information can only be extracted indirectly. Here, we have applied a time-resolved X-ray diffraction technique to investigate the structural dynamics of prototypical two-dimensional lead-free halide perovskite Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>nanoparticles across temporal scales from 80 ps to microseconds. We observed a quick recoverable (a few ns) photoinduced microstrain up to 0.15% and a long existing lattice expansion (∼a few hundred nanoseconds) at mild laser fluence. Once the laser flux exceeds 1.4 mJ/cm<sup>2</sup>, the microstrain saturates and the crystalline phase partially transfers into a disordered phase. This photoinduced transient structural change can recover within the nanosecond time scale. These results indicate that photoexcitation of charge carriers couples with lattice distortion, which fundamentally affects the dielectric environment and charge carrier transport.</p>}},
author = {{Wang, Yingqi and Liu, Cunming and Ren, Yang and Zuo, Xiaobing and Canton, Sophie E. and Zheng, Kaibo and Lu, Kuangda and Lü, Xujie and Yang, Wenge and Zhang, Xiaoyi}},
issn = {{0002-7863}},
language = {{eng}},
number = {{12}},
pages = {{5335--5341}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of the American Chemical Society}},
title = {{Visualizing Light-Induced Microstrain and Phase Transition in Lead-Free Perovskites Using Time-Resolved X-Ray Diffraction}},
url = {{http://dx.doi.org/10.1021/jacs.1c11747}},
doi = {{10.1021/jacs.1c11747}},
volume = {{144}},
year = {{2022}},
}