@article{8a5b21973bbe4ef69bec5fd0f52b28b0,
title = "Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites",
abstract = "Femtosecond resolution electron scattering techniques are applied to resolve the first atomic-scale steps following absorption of a photon in the prototypical hybrid perovskite methylammonium lead iodide. Following above-gap photoexcitation, we directly resolve the transfer of energy from hot carriers to the lattice by recording changes in the mean square atomic displacements on 10-ps time scales. Measurements of the time-dependent pair distribution function show an unexpected broadening of the iodine-iodine correlation function while preserving the Pb–I distance. This indicates the formation of a rotationally disordered halide octahedral structure developing on picosecond time scales. This work shows the important role of light-induced structural deformations within the inorganic sublattice in elucidating the unique optoelectronic functionality exhibited by hybrid perovskites and provides new understanding of hot carrier—lattice interactions, which fundamentally determine solar cell efficiencies.",
author = "Xiaoxi Wu and Tan, {Liang Z.} and Xiaozhe Shen and Te Hu and Kiyoshi Miyata and {Tuan Trinh}, M. and Renkai Li and Ryan Coffee and Shi Liu and Egger, {David A.} and Igor Makasyuk and Qiang Zheng and Alan Fry and Robinson, {Joseph S.} and Smith, {Matthew D.} and Burak Guzelturk and Karunadasa, {Hemamala I.} and Xijie Wang and Xiaoyang Zhu and Leeor Kronik and Rappe, {Andrew M.} and Lindenberg, {Aaron M.}",
note = "Funding Information: This work was supported by the Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division. The UED source was supported in part by the DOE BES Scientific User Facilities Division and the SLAC UED/UEM program development fund. X.Z. acknowledges the US Department of Energy, Office of Science - Basic Energy Sciences, Grant ER46980 for supporting the growth of the hybrid perovskite samples used in this study. L.Z.T. and A.M.R. acknowledge support from the Office of Naval Research under grant number N00014-17-1-2574. D.A.E. and L.K. were supported by the Austrian Science Fund (FWF): J3608–N20 and by a research grant from Dana and Yossie Hollander, in the framework of the WIS Sustainability and Energy Research Initiative. T.H. acknowledges support from the Precourt Institute for Energy. H.I.K. thanks the Alfred P. Sloan Foundation for support. M.D.S. is supported by an NSF Graduate Research Fellowship (DGE-114747). Part of this work was performed at the Stanford Nano Shared Facilities (SNSF), supported by the NSF under award ECCS-1542152. Publisher Copyright: Copyright {\textcopyright} 2017 The Authors, some rights reserved.",
year = "2017",
month = jul,
day = "5",
doi = "10.1126/sciadv.1602388",
language = "English",
volume = "3",
journal = "Science advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science",
number = "7",
}