Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites
Xiaoxi Wu,Liang Z. Tan,Xiaozhe Shen,Te Hu,Kiyoshi Miyata,M. Tuan Trinh,Renkai Li,Ryan Coffee,Shi Liu,David Egger,Igor Makasyuk,Qiang Zheng,Alan Fry,Joseph Robinson,Matthew D. Smith,Burak Guzelturk,Hemamala I. Karunadasa,Xijie Wang,Xiaoyang Zhu,Leeor Kronik,Andrew M. Rappe,Aaron M. Lindenberg,Aaron M. Lindenberg +22 more
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TLDR
The important role of light-induced structural deformations within the inorganic sublattice in elucidating the unique optoelectronic functionality exhibited by hybrid perovskites is shown and new understanding of hot carrier—lattices interactions, which fundamentally determine solar cell efficiencies is provided.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.read more
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Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Journal ArticleDOI
Halide Perovskite Photovoltaics: Background, Status, and Future Prospects
TL;DR: The fundamentals, recent research progress, present status, and views on future prospects of perovskite-based photovoltaics, with discussions focused on strategies to improve both intrinsic and extrinsic (environmental) stabilities of high-efficiency devices are described.
Journal ArticleDOI
Light-induced lattice expansion leads to high-efficiency perovskite solar cells
Hsinhan Tsai,Hsinhan Tsai,Reza Asadpour,Jean-Christophe Blancon,Constantinos C. Stoumpos,Olivier Durand,Joseph Strzalka,Bo Chen,Rafael Verduzco,Pulickel M. Ajayan,Sergei Tretiak,Jacky Even,Muhammad Ashraf Alam,Mercouri G. Kanatzidis,Wanyi Nie,Aditya D. Mohite,Aditya D. Mohite +16 more
TL;DR: Correlated, in situ structural and device characterizations reveal that light-induced lattice expansion benefits the performances of a mixed-cation pure-halide planar device, boosting the power conversion efficiency from 18.5 to 20.5%.
Journal ArticleDOI
What Remains Unexplained about the Properties of Halide Perovskites
David Egger,Achintya Bera,David Cahen,Gary Hodes,Thomas Kirchartz,Thomas Kirchartz,Leeor Kronik,Robert Lovrincic,Andrew M. Rappe,David R. Reichman,Omer Yaffe +10 more
TL;DR: The notion that halide perovskite crystals (ABX3) exhibit unique structural and optoelectronic behavior deserves serious scrutiny, and the question which attributes of these materials are unusual, is discussed, with an emphasis on the identification of the most important remaining issues.
Journal Article
Local polar fluctuations in lead halide perovskite crystals
Yinsheng Guo,Omer Yaffe,Liang Tan,David Egger,Trevor D. Hull,Constantinos C. Stoumpos,Fan Zheng,Tony F. Heinz,Leeor Kronik,Mercouri G. Kanatzidis,Jonathan S. Owen,Andrew M. Rappe,Marcos A. Pimenta,Louis E. Brus +13 more
TL;DR: Observations of a strong central peak in the cubic phase of both hybrid and all-inorganic lead-halide perovskites show that anharmonic, local polar fluctuations are intrinsic to the general lead- Halide Perovskite structure, and not unique to the dipolar organic cation.
References
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Journal ArticleDOI
Fast parallel algorithms for short-range molecular dynamics
TL;DR: In this article, three parallel algorithms for classical molecular dynamics are presented, which can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors.
Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Journal ArticleDOI
Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites
Michael M. Lee,Joël Teuscher,Tsutomu Miyasaka,Takurou N. Murakami,Takurou N. Murakami,Henry J. Snaith +5 more
TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.
Journal ArticleDOI
Efficient planar heterojunction perovskite solar cells by vapour deposition
TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
Journal ArticleDOI
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3
Guichuan Xing,Nripan Mathews,Shuangyong Sun,Swee Sien Lim,Yeng Ming Lam,Michael Grätzel,Michael Grätzel,Subodh Mhaisalkar,Tze Chien Sum +8 more
TL;DR: Two studies show, using a variety of time-resolved absorption and emission spectroscopic techniques, that perovskite materials manifest relatively long diffusion paths for charge carriers energized by light absorption, highlighting effective carrier diffusion as a fruitful parameter for further optimization.