Slow thermal equilibration in methylammonium lead iodide revealed by transient mid-infrared spectroscopy

Peijun Guo, Jue Gong, Sridhar Sadasivam, Yi Xia, Tze-Bin Song, Benjamin T. Diroll, Constantinos C. Stoumpos, John B. Ketterson, Mercouri G. Kanatzidis, Maria K. Y. Chan, Pierre Darancet, Tao Xu and Richard D. Schaller ()
Additional contact information
Peijun Guo: Argonne National Laboratory
Jue Gong: Northern Illinois University
Sridhar Sadasivam: Argonne National Laboratory
Yi Xia: Argonne National Laboratory
Tze-Bin Song: Northwestern University
Benjamin T. Diroll: Argonne National Laboratory
Constantinos C. Stoumpos: Northwestern University
John B. Ketterson: Northwestern University
Mercouri G. Kanatzidis: Northwestern University
Maria K. Y. Chan: Argonne National Laboratory
Pierre Darancet: Argonne National Laboratory
Tao Xu: Northern Illinois University
Richard D. Schaller: Argonne National Laboratory

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Hybrid organic–inorganic perovskites are emerging semiconductors for cheap and efficient photovoltaics and light-emitting devices. Different from conventional inorganic semiconductors, hybrid perovskites consist of coexisting organic and inorganic sub-lattices, which present disparate atomic masses and bond strengths. The nanoscopic interpenetration of these disparate components, which lack strong electronic and vibrational coupling, presents fundamental challenges to the understanding of charge and heat dissipation. Here we study phonon population and equilibration processes in methylammonium lead iodide (MAPbI3) by transiently probing the vibrational modes of the organic sub-lattice following above-bandgap optical excitation. We observe inter-sub-lattice thermal equilibration on timescales ranging from hundreds of picoseconds to a couple of nanoseconds. As supported by a two-temperature model based on first-principles calculations, the slow thermal equilibration is attributable to the sequential phonon populations of the inorganic and organic sub-lattices, respectively. The observed long-lasting thermal non-equilibrium offers insights into thermal transport and heat management of the emergent hybrid material class.

Date: 2018
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-018-05015-9 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05015-9

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-05015-9

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().