Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

A new perspective on lone pair dynamics in halide perovskites

Journal Article · · APL Materials
DOI:https://doi.org/10.1063/5.0001908· OSTI ID:1767723
 [1];  [2]
  1. Rutgers Univ., Piscataway, NJ (United States); OSTI
  2. Temple Univ., Philadelphia, PA (United States)
Halide perovskites form the foundation of an emerging class of materials for broad application in renewable and sustainable applications, including photocatalysis and solar energy harvesting. These materials exhibit beneficial photophysical properties, including bandgaps suitable for solar energy harvesting and efficient charge screening that underlies efficient charge carrier separation and resistance to defects. For organic–inorganic hybrid perovskites, these benefits are thought to arise, in part, from dipolar molecular cations that can reorient in response to charged particles and defects. In this work, we provide a similar perspective for inorganic metal halide perovskites, which do not contain molecular species with permanent dipoles. We discuss how lone pair electrons lead to dipolar ions that exhibit dynamics in analogy with traditional molecular plastic crystals and hybrid perovskites. We argue that further understanding these electronic plastic crystal motions with first principles simulations and synchrotron scattering can help create a basic understanding of photophysical properties of metal halide perovskites and inform the design of advanced functional materials.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Complex Materials from First Principles (CCM); Temple Univ., Philadelphia, PA (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Army Research Office (ARO); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012575
OSTI ID:
1767723
Alternate ID(s):
OSTI ID: 1618590
Journal Information:
APL Materials, Journal Name: APL Materials Journal Issue: 5 Vol. 8; ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (52)

Highly Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Crosslinking Method journal March 2016
Quickstep: Fast and accurate density functional calculations using a mixed Gaussian and plane waves approach journal April 2005
First principle study of the structural and optoelectronic properties of cubic perovskites CsPbM3 (M=Cl, Br, I) journal September 2011
Recent progress in fundamental understanding of halide perovskite semiconductors journal December 2019
Hybrid Organic–Inorganic Perovskites on the Move journal February 2016
Molecular Simulation of Covalent Bond Dynamics in Liquid Silicon journal March 2020
Halogen Bond Structure and Dynamics from Molecular Simulations journal June 2019
Identification of Lone-Pair Surface States on Indium Oxide journal December 2018
How Important Is the Organic Part of Lead Halide Perovskite Photovoltaic Cells? Efficient CsPbBr 3 Cells journal June 2015
Real-Time Observation of Organic Cation Reorientation in Methylammonium Lead Iodide Perovskites journal August 2015
Charge Carriers in Hybrid Organic–Inorganic Lead Halide Perovskites Might Be Protected as Large Polarons journal November 2015
Origin of Reversible Photoinduced Phase Separation in Hybrid Perovskites journal January 2017
How Lattice and Charge Fluctuations Control Carrier Dynamics in Halide Perovskites journal November 2018
Direct Observation of Dynamic Symmetry Breaking above Room Temperature in Methylammonium Lead Iodide Perovskite journal October 2016
CsSnBr 3 , A Lead-Free Halide Perovskite for Long-Term Solar Cell Application: Insights on SnF 2 Addition journal October 2016
Vapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance journal August 2017
Simulation of dynamical processes in molecular solids journal May 1990
Dynamic Stereochemical Activity of the Sn 2+ Lone Pair in Perovskite CsSnBr 3 journal September 2016
Universal Dynamics of Molecular Reorientation in Hybrid Lead Iodide Perovskites journal November 2017
Thermal Effects on CH 3 NH 3 PbI 3 Perovskite from Ab Initio Molecular Dynamics Simulations journal March 2015
Principles of Chemical Bonding and Band Gap Engineering in Hybrid Organic–Inorganic Halide Perovskites journal February 2015
Nanocrystals of Cesium Lead Halide Perovskites (CsPbX 3 , X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut journal February 2015
Chemically diverse and multifunctional hybrid organic–inorganic perovskites journal February 2017
The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells journal May 2015
Dynamic emission Stokes shift and liquid-like dielectric solvation of band edge carriers in lead-halide perovskites journal March 2019
Metal halide perovskite nanostructures for optoelectronic applications and the study of physical properties journal February 2019
Chemical dynamics, molecular energetics, and kinetics at the synchrotron journal January 2010
Inorganic caesium lead iodide perovskite solar cells journal January 2015
Chemical tuning of dynamic cation off-centering in the cubic phases of hybrid tin and lead halide perovskites journal January 2017
Bonding heterogeneity and lone pair induced anharmonicity resulted in ultralow thermal conductivity and promising thermoelectric properties in n-type AgPbBiSe 3 journal January 2019
Gaussian basis sets for accurate calculations on molecular systems in gas and condensed phases journal September 2007
Orientational order in ionic crystals containing tetrahedral ions journal December 1983
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Localized holes and delocalized electrons in photoexcited inorganic perovskites: Watching each atomic actor by picosecond X-ray absorption spectroscopy journal July 2017
Intrinsic anion diffusivity in lead halide perovskites is facilitated by a soft lattice journal November 2018
Bonding in the metallic molecular solid α -Gallium journal June 2018
A molecular dynamics method for simulations in the canonical ensemble journal June 1984
Separable dual-space Gaussian pseudopotentials journal July 1996
Ab initio study of BaTiO 3 surfaces journal July 1997
General and efficient algorithms for obtaining maximally localized Wannier functions journal April 2000
First-principles indicators of metallicity and cation off-centricity in the IV-VI rocksalt chalcogenides of divalent Ge, Sn, and Pb journal March 2003
Strong deviations from jellium behavior in the valence electron dynamics of potassium journal October 2009
Electronic band structure, phonons, and exciton binding energies of halide perovskites CsSnCl 3 , CsSnBr 3 , and CsSnI 3 journal October 2013
Dynamic symmetry breaking and spin splitting in metal halide perovskites journal August 2018
Local Polar Fluctuations in Lead Halide Perovskite Crystals journal March 2017
Attosecond Dynamics of s p -Band Photoexcitation journal October 2019
Lone Pair Rotational Dynamics in Solids journal February 2020
Generalized Gradient Approximation Made Simple journal October 1996
Distortion modes in halide perovskites: To twist or to stretch, a matter of tolerance and lone pairs journal June 2018
Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation journal October 2017
Screening in crystalline liquids protects energetic carriers in hybrid perovskites journal September 2016
Real-Time Probing of Electron Dynamics Using Attosecond Time-Resolved Spectroscopy journal May 2016

Cited By (1)

Cation Dynamics in Hybrid Halide Perovskites preprint January 2020