Journal article
Photoinduced, reversible phase transitions in all-inorganic perovskite nanocrystals
Nature communications, Vol.10(1), 504
30 Jan 2019
PMID: 30700706
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Significant interest exists in lead trihalides that present the perovskite structure owing to their demonstrated potential in photovoltaic, lasing, and display applications. These materials are also notable for their unusual phase behavior often displaying easily accessible phase transitions. In this work, time-resolved X-ray diffraction, performed on perovskite cesium lead bromide nanocrystals, maps the lattice response to controlled excitation fluence. These nanocrystals undergo a reversible, photoinduced orthorhombic-to-cubic phase transition which is discernible at fluences greater than 0.34 mJ cm
−2
through the loss of orthorhombic features and shifting of high-symmetry peaks. This transition recovers on the timescale of 510 ± 100 ps. A reversible crystalline-to-amorphous transition, observable through loss of Bragg diffraction intensity, occurs at higher fluences (greater than 2.5 mJ cm
−2
). These results demonstrate that light-driven phase transitions occur in perovskite materials, which will impact optoelectronic applications and enable the manipulation of non-equilibrium phase characteristics of the broad perovskite material class.
Lead trihalide perovskites are notable for their excellent optoelectronic properties and uncommon phase behavior. Here, Kirschner et al. show that cesium lead bromide nanocrystals experience a reversible orthorhombic-to-cubic phase transition at moderate excitation fluences and become amorphous at higher fluences.
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Details
- Title
- Photoinduced, reversible phase transitions in all-inorganic perovskite nanocrystals
- Creators
- Matthew S. Kirschner - Northwestern UniversityBenjamin T. Diroll - Argonne National LaboratoryPeijun Guo - Argonne National LaboratorySamantha M. Harvey - Northwestern UniversityWaleed Helweh - Northwestern UniversityNathan C. Flanders - Northwestern UniversityAlexandra Brumberg - Northwestern UniversityNicolas E. Watkins - Northwestern UniversityAriel A. Leonard - Northwestern UniversityAustin M. Evans - Northwestern UniversityMichael R. Wasielewski - Northwestern UniversityWilliam R. Dichtel - Northwestern UniversityXiaoyi Zhang - Argonne National LaboratoryLin X. Chen - Argonne National LaboratoryRichard D. Schaller - Argonne National LaboratoryArgonne National Laboratory (ANL), Argonne, IL (United States)
- Publication Details
- Nature communications, Vol.10(1), 504
- Publisher
- Nature Publishing Group
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000457130800020
- Scopus ID
- 2-s2.0-85060923140
- Other Identifier
- 991022053868804721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary