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Signatures of Coherent Phonon Transport in Ultralow Thermal Conductivity Two-Dimensional Ruddlesden–Popper Phase Perovskites

Journal Article · · ACS Nano
An emerging class of methylammonium lead iodide (MAPbI3)-based Ruddlesden-Popper (RP) phase perovskites, BA2MAn-1PbnI3n+1 (n = 1-7), exhibit enhanced stability to environmental conditions relative to MAPbI3, yet still degrade at elevated temperatures. Here, we experimentally determine the thermal conductivities of these layered RP phases for n = 1-6, where n defines the number of repeated perovskite octahedra per layer. We measure thermal conductivities of 0.37 ± 0.13/0.12, 0.17 ± 0.08/0.07, 0.21 ± 0.05/0.04, and 0.19 ± 0.04/0.03 W/m∙K in thin films of n = 1-4 and 0.08 ± 0.06/0.04, 0.06 ± 0.04/0.03, 0.06 ± 0.03/0.03, and 0.08 ± 0.07/0.04 W/m∙K in single crystals of n = 3-6. With the exception of n = 1, these thermal conductivities are lower than the range of 0.34-0.50 W/m∙K reported for single-crystal MAPbI3. Reduced-order lattice dynamics modeling suggests that the initially decreasing trend of thermal conductivity in similarly oriented perovskites with increasing n may result from the transport properties of coherent phonons, emergent from the superstructure, that do not scatter at the interfaces of organic butylammonium chains and perovskite octahedra. Reduced group velocity of coherent phonons in n = 3-6, a consequence of band flattening in the phonon dispersion, is primarily responsible for their ultralow thermal conductivities. Similar effects on thermal conductivity have been experimentally demonstrated in deposited superlattices, but never in naturally defined materials such as RP phases. GIWAXS measurements reveal that higher n RP phase thin films are less orientationally controlled and therefore possess apparently elevated thermal conductivities relative to single crystals of the same n.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Army Research Office (ARO); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1864310
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 3 Vol. 15; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (58)

Perovskite Materials for Light-Emitting Diodes and Lasers journal May 2016
Phase Transition Control for High Performance Ruddlesden-Popper Perovskite Solar Cells journal April 2018
Intrinsic Thermal Instability of Methylammonium Lead Trihalide Perovskite journal June 2015
Coordination Engineering of Single‐Crystal Precursor for Phase Control in Ruddlesden–Popper Perovskite Solar Cells journal February 2020
A Layered Hybrid Perovskite Solar-Cell Absorber with Enhanced Moisture Stability journal September 2014
Similar Structural Dynamics for the Degradation of CH 3 NH 3 PbI 3 in Air and in Vacuum journal September 2015
Highly‐Stable Organo‐Lead Halide Perovskites Synthesized Through Green Self‐Assembly Process journal March 2018
High Members of the 2D Ruddlesden-Popper Halide Perovskites: Synthesis, Optical Properties, and Solar Cells of (CH 3 (CH 2 ) 3 NH 3 ) 2 (CH 3 NH 3 ) 4 Pb 5 I 16 journal March 2017
Seven-Layered 2D Hybrid Lead Iodide Perovskites journal October 2019
Effect of temperature on light induced degradation in methylammonium lead iodide perovskite thin films and solar cells journal January 2018
Ruddlesden–Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors journal April 2016
Controlling Solvate Intermediate Growth for Phase-Pure Organic Lead Iodide Ruddlesden–Popper (C 4 H 9 NH 3 ) 2 (CH 3 NH 3 ) n −1 Pb n I 3 n +1 Perovskite Thin Films journal July 2019
Coarse-Grained Protein Models and Their Applications journal June 2016
Thermal Conductivity of Methylammonium Lead Halide Perovskite Single Crystals and Thin Films: A Comparative Study journal December 2017
Inorganic Cage Motion Dominates Excited-State Dynamics in 2D-Layered Perovskites (C x H 2 x +1 NH 3 ) 2 PbI 4 ( x = 4–9) journal October 2019
Layer-Dependent Coherent Acoustic Phonons in Two-Dimensional Ruddlesden–Popper Perovskite Crystals journal August 2019
Ultralow Thermal Conductivity of Two-Dimensional Metal Halide Perovskites journal March 2020
Charge-Carrier Dynamics in 2D Hybrid Metal–Halide Perovskites journal October 2016
Phonon Speed, Not Scattering, Differentiates Thermal Transport in Lead Halide Perovskites journal August 2017
Low-Threshold Lasing from 2D Homologous Organic–Inorganic Hybrid Ruddlesden–Popper Perovskite Single Crystals journal April 2018
Enhancing Thermal Interface Conductance to Graphene Using Ni–Pd Alloy Contacts journal July 2020
Chain-Length Dependence of Thermal Conductivity in 2D Alkylammonium Lead Iodide Single Crystals journal November 2020
Direct Observation of Dynamic Symmetry Breaking above Room Temperature in Methylammonium Lead Iodide Perovskite journal October 2016
Electron–Phonon Scattering in Atomically Thin 2D Perovskites journal October 2016
2D Homologous Perovskites as Light-Absorbing Materials for Solar Cell Applications journal June 2015
Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH 3 NH 3 PbI 3 journal July 2014
Hybrid organic—inorganic perovskites: low-cost semiconductors with intriguing charge-transport properties journal January 2016
Sequential deposition as a route to high-performance perovskite-sensitized solar cells journal July 2013
High-efficiency two-dimensional Ruddlesden–Popper perovskite solar cells journal July 2016
Suppressed decomposition of organometal halide perovskites by impermeable electron-extraction layers in inverted solar cells journal January 2017
Accelerated degradation of methylammonium lead iodide perovskites induced by exposure to iodine vapour journal December 2016
Crossover from incoherent to coherent phonon scattering in epitaxial oxide superlattices journal December 2013
Metal-halide perovskites for photovoltaic and light-emitting devices journal May 2015
Cross-plane coherent acoustic phonons in two-dimensional organic-inorganic hybrid perovskites journal May 2018
Phonon coherences reveal the polaronic character of excitons in two-dimensional lead halide perovskites journal January 2019
Investigation of Thermally Induced Degradation in CH3NH3PbI3 Perovskite Solar Cells using In-situ Synchrotron Radiation Analysis journal July 2017
Enhanced Stability of MAPbI3 Perovskite Solar Cells using Poly(p-chloro-xylylene) Encapsulation journal October 2019
Efficient carrier transport in halide perovskites: theoretical perspectives journal January 2014
Organometal halide perovskite solar cells: degradation and stability journal January 2016
Experimental and theoretical optical properties of methylammonium lead halide perovskites journal January 2016
Degradation observations of encapsulated planar CH 3 NH 3 PbI 3 perovskite solar cells at high temperatures and humidity journal January 2015
Pinhole-free hole transport layers significantly improve the stability of MAPbI 3 -based perovskite solar cells under operating conditions journal January 2015
Ultra-high Seebeck coefficient and low thermal conductivity of a centimeter-sized perovskite single crystal acquired by a modified fast growth method journal January 2017
Analysis of heat flow in layered structures for time-domain thermoreflectance journal December 2004
Crossover in thermal transport properties of natural, perovskite-structured superlattices journal October 2009
Phonon dispersion effects and the thermal conductivity reduction in GaAs/AlAs superlattices journal August 2000
Instrumentation of broadband frequency domain thermoreflectance for measuring thermal conductivity accumulation functions journal June 2013
Structural and thermodynamic limits of layer thickness in 2D halide perovskites journal December 2018
Lattice Dynamics Study of Anisotropic heat Conduction in Superlattices journal April 2001
Thermal Boundary Resistance in GaN Films Measured by Time Domain Thermoreflectance with Robust Monte Carlo Uncertainty Estimation journal January 2016
Phonon group velocity and thermal conduction in superlattices journal July 1999
Thermal conductivity of Si/Ge superlattices: A realistic model with a diatomic unit cell journal September 2000
GIXSGUI : a MATLAB toolbox for grazing-incidence X-ray scattering data visualization and reduction, and indexing of buried three-dimensional periodic nanostructured films journal April 2015
Grazing-incidence X-ray scattering of lamellar thin films journal February 2019
Large polarons in lead halide perovskites journal August 2017
Ultralow Thermal Conductivity in Disordered, Layered WSe2 Crystals journal January 2007
Coherent Phonon Heat Conduction in Superlattices journal November 2012
Charge-Carrier Dynamics in Organic-Inorganic Metal Halide Perovskites journal May 2016