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Title: Polar Fluctuations in Metal Halide Perovskites Uncovered by Acoustic Phonon Anomalies

Journal Article · · ACS Energy Letters

Solution-processable metal-halide perovskites (MHPs) offer great promise for efficient light harvesting and emitting devices due to their long carrier lifetime and superior carrier transport characteristics. Ferroelectric effects, a hallmark of traditional oxide perovskites, was proposed to be a mechanism to suppress carrier recombination and enhance charge transport in MHPs, but the existence and influence of such polar order is still of considerable debate. Here we performed transient reflection measurements on single crystals of both inorganic and organic-inorganic (hybrid) MHPs over a range of temperatures, and demonstrate significant phonon softening in the cubic phases close to the cubic-to-tetragonal phase transition temperatures. Such phonon softening indicates the formation of polar domains, which grow in size upon cooling and can persist in the low-temperature tetragonal and orthorhombic phases. Our results link the extraordinary electronic properties of MHPs to the spontaneous polarizations which can contribute to more efficient charge separation and characteristics of an indirect bandgap.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1402074
Journal Information:
ACS Energy Letters, Vol. 2, Issue 10; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

References (48)

From soft harmonic phonons to fast relaxational dynamics in CH 3 NH 3 PbBr 3 journal September 2015
Molecular ferroelectric contributions to anomalous hysteresis in hybrid perovskite solar cells journal August 2014
Excitonic emissions and above-band-gap luminescence in the single-crystal perovskite semiconductors CsPbB r 3 and CsPbC l 3 journal December 2015
Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide journal October 2016
Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals journal January 2015
Metal halide perovskites for energy applications journal May 2016
Switchable S = 1/2 and J = 1/2 Rashba bands in ferroelectric halide perovskites journal April 2014
Role of Ferroelectric Nanodomains in the Transport Properties of Perovskite Solar Cells journal January 2016
Ferroelectric Domain Wall Induced Band Gap Reduction and Charge Separation in Organometal Halide Perovskites journal February 2015
Direct Observation of Dynamic Symmetry Breaking above Room Temperature in Methylammonium Lead Iodide Perovskite journal October 2016
Rashba Spin–Orbit Coupling Enhanced Carrier Lifetime in CH 3 NH 3 PbI 3 journal November 2015
Direct Observation of Ferroelectric Domains in Solution-Processed CH 3 NH 3 PbI 3 Perovskite Thin Films journal September 2014
High-quality bulk hybrid perovskite single crystals within minutes by inverse temperature crystallization journal July 2015
Crystal Growth of the Perovskite Semiconductor CsPbBr 3 : A New Material for High-Energy Radiation Detection journal June 2013
Photoexcitation dynamics in solution-processed formamidinium lead iodide perovskite thin films for solar cell applications journal December 2015
Experimental and theoretical optical properties of methylammonium lead halide perovskites journal January 2016
Chemical tuning of dynamic cation off-centering in the cubic phases of hybrid tin and lead halide perovskites journal January 2017
Phonon modes and central peaks in an A -site relaxor: A low-frequency Raman study of sodium bismuth titanate journal August 2014
Surface generation and detection of phonons by picosecond light pulses journal September 1986
Atomistic Origins of High-Performance in Hybrid Halide Perovskite Solar Cells journal April 2014
Two-Inch-Sized Perovskite CH 3 NH 3 PbX 3 (X = Cl, Br, I) Crystals: Growth and Characterization journal August 2015
Entropy-driven structural transition and kinetic trapping in formamidinium lead iodide perovskite journal October 2016
Highly narrowband perovskite single-crystal photodetectors enabled by surface-charge recombination journal August 2015
Elastic softening and central peaks in BaTiO3 single crystals above the cubic-tetragonal phase-transition temperature journal September 2008
Low-temperature solution-processed wavelength-tunable perovskites for lasing journal March 2014
Direct–indirect character of the bandgap in methylammonium lead iodide perovskite journal October 2016
Elastic Constants and Thermal Expansion of CsPbCl 3 journal May 1978
Low-Temperature Solution-Grown CsPbBr 3 Single Crystals and Their Characterization journal September 2016
Electron–acoustic phonon coupling in single crystal CH3NH3PbI3 perovskites revealed by coherent acoustic phonons journal February 2017
Spatially resolved studies of the phases and morphology of methylammonium and formamidinium lead tri-halide perovskites journal January 2017
Research Update: Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells journal September 2016
Formamidinium Lead Halide Perovskite Crystals with Unprecedented Long Carrier Dynamics and Diffusion Length journal April 2016
Dielectric Response: Answer to Many Questions in the Methylammonium Lead Halide Solar Cell Absorbers journal May 2017
CH 3 NH 3 PbCl 3 Single Crystals: Inverse Temperature Crystallization and Visible-Blind UV-Photodetector journal September 2015
Calorimetric and IR spectroscopic studies of phase transitions in methylammonium trihalogenoplumbates (II)† journal January 1990
Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH 3 NH 3 PbI 3 journal July 2014
Ferroelectric Polarization in CH 3 NH 3 PbI 3 Perovskite journal April 2015
Tetragonal CH 3 NH 3 PbI 3 is ferroelectric journal June 2017
The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells journal May 2015
Photon recycling in lead iodide perovskite solar cells journal March 2016
Relaxing with relaxors: a review of relaxor ferroelectrics journal April 2011
The study of structural phase transitions by means of ultrasonic experiments journal November 1973
Ferroelectric domains in methylammonium lead iodide perovskite thin-films journal January 2017
CH 3 NH 3 PbI 3 perovskites: Ferroelasticity revealed journal April 2017
CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance journal May 2016
Lattice dynamics and the nature of structural transitions in organolead halide perovskites journal September 2016
Long-range hot-carrier transport in hybrid perovskites visualized by ultrafast microscopy journal April 2017
Ferroelectricity of CH 3 NH 3 PbI 3 Perovskite journal March 2015

Cited By (14)

Cross-plane coherent acoustic phonons in two-dimensional organic-inorganic hybrid perovskites journal May 2018
Dynamic shortening of disorder potentials in anharmonic halide perovskites journal July 2019
Photoinduced, reversible phase transitions in all-inorganic perovskite nanocrystals journal January 2019
Dynamic emission Stokes shift and liquid-like dielectric solvation of band edge carriers in lead-halide perovskites journal March 2019
Self-Healing Inside APbBr 3 Halide Perovskite Crystals journal January 2018
Unraveling exciton–phonon coupling in individual FAPbI3 nanocrystals emitting near-infrared single photons journal August 2018
Compressive sensing lattice dynamics. I. General formalism journal November 2019
Long-lived polarization memory in the electronic states of lead-halide perovskites from local structural dynamics journal August 2018
Carrier recombination mechanism in CsPbB r 3 revealed by time-resolved photoluminescence spectroscopy journal December 2019
Dynamic symmetry breaking and spin splitting in metal halide perovskites journal August 2018
Long-lived polarization memory in the electronic states of lead-halide perovskites from local structural dynamics. text January 2018
Unraveling exciton-phonon coupling in individual FAPbI(3) nanocrystals emitting near-infrared single photons text January 2018
Dynamic Symmetry Breaking and Spin Splitting in Metal Halide Perovskites text January 2017
Compressive sensing lattice dynamics. I. General formalism text January 2018

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