Journal article
Light-Induced Transient Lattice Dynamics and Metastable Phase Transition in CH3NH3PbI3 Nanocrystals
ACS nano, v 17(6), pp 5306-5315
28 Mar 2023
PMID: 36916650
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Methylammonium lead iodide (MAPbI3) perovskite nanocrystals (NCs) offer desirable optoelectronic properties with prospective utility in photovoltaics, lasers, and light-emitting diodes (LEDs). Structural rearrange-ments of MAPbI3 in response to photoexcitation, such as lattice distortions and phase transitions, are of particular interest, as these engender long carrier lifetime and bolster carrier diffusion. Here, we use variable temperature X-ray diffraction (XRD) and synchrotron-based transient X-ray diffraction (TRXRD) to investigate lattice response following ultrafast optical excitation. MAPbI3 NCs are found to slowly undergo a phase transition from the tetragonal to a pseudocubic phase over the course of 1 ns under 0.02??? 4.18 mJ/cm2 fluence photoexcitation, with apparent nonthermal lattice distortions attributed to polaron formation. Lattice recovery exceeds time scales expected for both carrier recombination and thermal dissipation, indicating meta-stability likely due to the proximal phase transition, with symmetry-breaking along equatorial and axial directions. These findings are relevant for fundamental understanding and applications of structure???function properties.
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Details
- Title
- Light-Induced Transient Lattice Dynamics and Metastable Phase Transition in CH3NH3PbI3 Nanocrystals
- Creators
- Ariel A. Leonard - Northwestern UniversityBenjamin T. Diroll - Argonne National LaboratoryNathan C. Flanders - Northwestern UniversityShobhana Panuganti - Northwestern UniversityAlexandra Brumberg - Northwestern UniversityMatthew S. Kirschner - Northwestern UniversityShelby A. Cuthriell - Northwestern UniversitySamantha M. Harvey - Northwestern UniversityNicolas E. Watkins - Northwestern UniversityJin Yu - Argonne National LaboratoryMichael R. Wasielewski - Northwestern UniversityMercouri G. Kanatzidis - Northwestern UniversityWilliam R. Dichtel - Northwestern UniversityXiaoyi Zhang - Argonne National LaboratoryLin X. Chen - Northwestern UniversityRichard D. Schaller - Northwestern University
- Publication Details
- ACS nano, v 17(6), pp 5306-5315
- Publisher
- Amer Chemical Soc
- Number of pages
- 10
- Grant note
- 1808590 / National Science Foundation MSN DE-FG02- 99ER14999 / Office of Science, Office of Basic Energy Sciences, Department of Energy; United States Department of Energy (DOE) 1808590 / Division Of Chemistry; Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) DE-AC02-06CH11357 / U.S. DOE, Office of Basic Energy Sciences; United States Department of Energy (DOE) DGE-1842165 / National Science Foundation Graduate Student Fellowship Program DE-AC02-06CH11357 / Argonne, a U.S. Depart-ment of Energy Office of Science laboratory; United States Department of Energy (DOE) DE-AC02-06CH11357 / Ultrafast Initiative of the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, through Argonne National Laboratory; United States Department of Energy (DOE) (Argonne?) U.S. Departmentof Energy Office of Science User Facilities
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000958590900001
- Scopus ID
- 2-s2.0-85150469707
- Other Identifier
- 991022053869204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology