DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Geometry Distortion and Small Polaron Binding Energy Changes with Ionic Substitution in Halide Perovskites

Journal Article · · Journal of Physical Chemistry Letters

Halide perovskites have demonstrated remarkable performance in optoelectronic applications. Despite extraordinary progress, questions remain about device stability. We report an in-depth computational study of small polaron formation, electronic structure, charge density, and reorganization energies of several experimentally relevant halide perovskites using isolated clusters. Local lattice symmetry, electronic structure, and electron-phonon coupling are interrelated in polaron formation in these materials. To illustrate this, first principles calculations are performed on (MA/Cs/FA)Pb(I/Br)3 and MASnI3. Across the materials studied, electron small polaron formation is manifested by Jahn-Teller like distortions in the central octahedron, with apical PbI bonds expanding significantly more than the equatorial bonds. In contrast, hole polarons cause the central octahedron to uniformly contract. This difference in manifestation of electron and hole polaron formation can be a tool to determine what is taking place in individual systems to systematically control performance. Other trends as the anion and cations are changed, are established for optimization in specific optoelectronic applications.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1487363
Report Number(s):
LA-UR-18-30565
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 24 Vol. 9; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Interfacial Control Toward Efficient and Low-Voltage Perovskite Light-Emitting Diodes journal February 2015
Photostriction of CH 3 NH 3 PbBr 3 Perovskite Crystals journal July 2017
Electron Transfer Reactions in Chemistry: Theory and Experiment (Nobel Lecture) journal August 1993
Exciton-phonon interactions in the Cs 3 Bi 2 I 9 crystal structure revealed by Raman spectroscopic studies : Exciton-phonon interactions in Cs journal October 2016
Studies of polaron motion journal November 1959
Polaron formation and symmetry breaking journal June 2003
Phase transitions in the perovskite methylammonium lead bromide, CH3ND3PbBr3 journal November 2003
High-temperature structural evolution of caesium and rubidium triiodoplumbates journal October 2008
First principle study of the structural and optoelectronic properties of cubic perovskites CsPbM3 (M=Cl, Br, I) journal September 2011
Strong Electron–Phonon Coupling and Self-Trapped Excitons in the Defect Halide Perovskites A 3 M 2 I 9 (A = Cs, Rb; M = Bi, Sb) journal April 2017
Ultrafast Exciton Dynamics in Shape-Controlled Methylammonium Lead Bromide Perovskite Nanostructures: Effect of Quantum Confinement on Charge Carrier Recombination journal December 2017
Charge Carriers in Hybrid Organic–Inorganic Lead Halide Perovskites Might Be Protected as Large Polarons journal November 2015
Thermodynamic Origin of Photoinstability in the CH 3 NH 3 Pb(I 1– x Br x ) 3 Hybrid Halide Perovskite Alloy journal March 2016
Direct Experimental Evidence for Photoinduced Strong-Coupling Polarons in Organolead Halide Perovskite Nanoparticles journal November 2016
Narrow Linewidth Excitonic Emission in Organic–Inorganic Lead Iodide Perovskite Single Crystals journal November 2016
Pressure-Induced Polymorphic, Optical, and Electronic Transitions of Formamidinium Lead Iodide Perovskite journal April 2017
Long-Lived Photoinduced Polarons in Organohalide Perovskites journal June 2017
Polaron Stabilization by Cooperative Lattice Distortion and Cation Rotations in Hybrid Perovskite Materials journal May 2016
Origin of Reversible Photoinduced Phase Separation in Hybrid Perovskites journal January 2017
Concept of Lattice Mismatch and Emergence of Surface States in Two-dimensional Hybrid Perovskite Quantum Wells journal August 2018
Excitonic and Polaronic Properties of 2D Hybrid Organic–Inorganic Perovskites journal January 2017
Rashba and Dresselhaus Effects in Hybrid Organic–Inorganic Perovskites: From Basics to Devices journal September 2015
Advances and Promises of Layered Halide Hybrid Perovskite Semiconductors journal October 2016
Composite Nature of Layered Hybrid Perovskites: Assessment on Quantum and Dielectric Confinements and Band Alignment journal February 2018
Anomalous Dielectric Behavior of a Pb/Sn Perovskite: Effect of Trapped Charges on Complex Photoconductivity journal June 2018
Crystal Growth of the Perovskite Semiconductor CsPbBr 3 : A New Material for High-Energy Radiation Detection journal June 2013
Pressure Response of an Organic−Inorganic Perovskite:  Methylammonium Lead Bromide journal May 2007
Tuning the Band Gap in Hybrid Tin Iodide Perovskite Semiconductors Using Structural Templating journal June 2005
Semiconducting Tin and Lead Iodide Perovskites with Organic Cations: Phase Transitions, High Mobilities, and Near-Infrared Photoluminescent Properties journal July 2013
Modeling of Lead Halide Perovskites for Photovoltaic Applications journal November 2014
Light-activated photocurrent degradation and self-healing in perovskite solar cells journal May 2016
Electron–phonon coupling in hybrid lead halide perovskites journal May 2016
Steric engineering of metal-halide perovskites with tunable optical band gaps journal December 2014
Perovskite energy funnels for efficient light-emitting diodes journal June 2016
Detection of X-ray photons by solution-processed lead halide perovskites journal May 2015
Detection of gamma photons using solution-grown single crystals of hybrid lead halide perovskites journal July 2016
Rationalizing the light-induced phase separation of mixed halide organic–inorganic perovskites journal August 2017
Excited-state vibrational dynamics toward the polaron in methylammonium lead iodide perovskite journal June 2018
Large tunable photoeffect on ion conduction in halide perovskites and implications for photodecomposition journal March 2018
Entropy in halide perovskites journal April 2018
Ultrafast zero-bias photocurrent and terahertz emission in hybrid perovskites journal April 2018
Luminescent hybrid perovskite nanoparticles as a new platform for selective detection of 2,4,6-trinitrophenol journal January 2014
Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics journal January 2015
Interplay of spin–orbit coupling and lattice distortion in metal substituted 3D tri-chloride hybrid perovskites journal January 2015
Polaron self-localization in white-light emitting hybrid perovskites journal January 2017
Synthesis and crystal chemistry of the hybrid perovskite (CH3NH3)PbI3 for solid-state sensitised solar cell applications journal January 2013
Polaronic exciton binding energy in iodide and bromide organic-inorganic lead halide perovskites journal December 2015
Localized holes and delocalized electrons in photoexcited inorganic perovskites: Watching each atomic actor by picosecond X-ray absorption spectroscopy journal July 2017
Density functional theory + U modeling of polarons in organohalide lead perovskites journal December 2016
Electric Field Control of Jahn-Teller Distortions in Bulk Perovskites journal February 2016
Elastic Softness of Hybrid Lead Halide Perovskites journal August 2018
Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts journal September 2014
Jahn-Teller Phenomena in Solids journal August 1998

Cited By (4)

Perspective: Exciton polarons in two-dimensional hybrid metal-halide perovskites text January 2019
Polarons in Metal Halide Perovskites journal April 2020
Optical deformation potential and self-trapped excitons in 2D hybrid perovskites journal January 2019
Resonant free-carrier absorption in 2D hybrid organic-inorganic perovskites: The Rashba effect or small polarons? journal November 2019