%0 Journal Article %1 wu2017lightinduced %A Wu, Xiaoxi %A Tan, Liang Z. %A Shen, Xiaozhe %A Hu, Te %A Miyata, Kiyoshi %A Trinh, M. Tuan %A Li, Renkai %A Coffee, Ryan %A Liu, Shi %A Egger, David A. %A Makasyuk, Igor %A Zheng, Qiang %A Fry, Alan %A Robinson, Joseph S. %A Smith, Matthew D. %A Guzelturk, Burak %A Karunadasa, Hemamala I. %A Wang, Xijie %A Zhu, Xiaoyang %A Kronik, Leeor %A Rappe, Andrew M. %A Lindenberg, Aaron M. %D 2017 %J Sci Adv %K %N 7 %T Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites %U http://advances.sciencemag.org/content/3/7/e1602388.abstract %V 3 %X 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.

@article{wu2017lightinduced, 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.}, added-at = {2017-08-04T11:15:57.000+0200}, author = {Wu, Xiaoxi and Tan, Liang Z. and Shen, Xiaozhe and Hu, Te and Miyata, Kiyoshi and Trinh, M. Tuan and Li, Renkai and Coffee, Ryan and Liu, Shi and Egger, David A. and Makasyuk, Igor and Zheng, Qiang and Fry, Alan and Robinson, Joseph S. and Smith, Matthew D. and Guzelturk, Burak and Karunadasa, Hemamala I. and Wang, Xijie and Zhu, Xiaoyang and Kronik, Leeor and Rappe, Andrew M. and Lindenberg, Aaron M.}, biburl = {https://www.bibsonomy.org/bibtex/2a71ec1933ea921b55630bd3bd2645a04/friv10}, interhash = {a2f538220d9514afcf75470e6eb3c478}, intrahash = {a71ec1933ea921b55630bd3bd2645a04}, journal = {Sci Adv}, keywords = {}, month = jul, number = 7, timestamp = {2017-08-04T11:15:57.000+0200}, title = {Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites}, url = {http://advances.sciencemag.org/content/3/7/e1602388.abstract}, volume = 3, year = 2017 }