Effects of Electron–Phonon Coupling on Electronic Properties of Methylammonium Lead Iodide Perovskites

2018 ◽  
Vol 9 (24) ◽  
pp. 7090-7097 ◽  
Author(s):  
Wissam A. Saidi ◽  
Ali Kachmar
Keyword(s):  
Electronic Properties ◽  
Phonon Coupling ◽  
Lead Iodide ◽  
Electron Phonon Coupling ◽  
Methylammonium Lead Iodide

scholarly journals Acoustic phonon lifetimes limit thermal transport in methylammonium lead iodide

2018 ◽  
Vol 115 (47) ◽  
pp. 11905-11910 ◽  
Author(s):  
Aryeh Gold-Parker ◽  
Peter M. Gehring ◽  
Jonathan M. Skelton ◽  
Ian C. Smith ◽  
Dan Parshall ◽  
...  
Keyword(s):  
Lattice Dynamics ◽  
Acoustic Phonon ◽  
Optoelectronic Devices ◽  
High Energy ◽  
High Energy Resolution ◽  
Phonon Coupling ◽  
Lead Iodide ◽  
Phonon Modes ◽  
Electron Phonon Coupling ◽  
Methylammonium Lead Iodide

Hybrid organic–inorganic perovskites (HOIPs) have become an important class of semiconductors for solar cells and other optoelectronic applications. Electron–phonon coupling plays a critical role in all optoelectronic devices, and although the lattice dynamics and phonon frequencies of HOIPs have been well studied, little attention has been given to phonon lifetimes. We report high-precision momentum-resolved measurements of acoustic phonon lifetimes in the hybrid perovskite methylammonium lead iodide (MAPI), using inelastic neutron spectroscopy to provide high-energy resolution and fully deuterated single crystals to reduce incoherent scattering from hydrogen. Our measurements reveal extremely short lifetimes on the order of picoseconds, corresponding to nanometer mean free paths and demonstrating that acoustic phonons are unable to dissipate heat efficiently. Lattice-dynamics calculations using ab initio third-order perturbation theory indicate that the short lifetimes stem from strong three-phonon interactions and a high density of low-energy optical phonon modes related to the degrees of freedom of the organic cation. Such short lifetimes have significant implications for electron–phonon coupling in MAPI and other HOIPs, with direct impacts on optoelectronic devices both in the cooling of hot carriers and in the transport and recombination of band edge carriers. These findings illustrate a fundamental difference between HOIPs and conventional photovoltaic semiconductors and demonstrate the importance of understanding lattice dynamics in the effort to develop metal halide perovskite optoelectronic devices.

scholarly journals Effect of surface composition on electronic properties of methylammonium lead iodide perovskite

2015 ◽  
Vol 1 (3) ◽  
pp. 213-220 ◽  
Author(s):  
Wei Geng ◽  
Chuan-Jia Tong ◽  
Zhen-Kun Tang ◽  
ChiYung Yam ◽  
Yan-Ning Zhang ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Surface Composition ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide ◽  
Effect Of Surface

Topotactic Intercalation of a Metallic Dense Host Matrix Chalcogenide with Large Electron−Phonon Coupling:  Crystal Structures and Electronic Properties of LixMo2SbS2(0 ≤x< 0.7)

2007 ◽  
Vol 19 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Alexandros Lappas ◽  
Christopher J. Nuttall ◽  
Zacharias G. Fthenakis ◽  
Vladimir Yu. Pomjakushin ◽  
Mark A. Roberts
Keyword(s):  
Electronic Properties ◽  
Crystal Structures ◽  
Phonon Coupling ◽  
Host Matrix ◽  
Electron Phonon Coupling

scholarly journals Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance

2015 ◽  
Vol 3 (43) ◽  
pp. 21760-21771 ◽  
Author(s):  
Byung-wook Park ◽  
Bertrand Philippe ◽  
Sagar M. Jain ◽  
Xiaoliang Zhang ◽  
Tomas Edvinsson ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Chemical Engineering ◽  
Photovoltaic Performance ◽  
Lead Iodide ◽  
Hybrid Perovskite ◽  
Lead Source ◽  
Methylammonium Lead Iodide

A convenient 1-step spincoating method for the hybrid perovskite MAPb(I1−xBrx)3(Cl)y, with PbCl2 as lead source, enables tuning of the bandgap.

scholarly journals Band-selective Holstein polaron in Luttinger liquid material A0.3MoO3 (A = K, Rb)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
L. Kang ◽  
X. Du ◽  
J. S. Zhou ◽  
X. Gu ◽  
Y. J. Chen ◽  
...  
Keyword(s):  
Charge Density ◽  
Electronic Properties ◽  
Charge Density Wave ◽  
Density Wave ◽  
Luttinger Liquid ◽  
Phonon Coupling ◽  
Strong Electron ◽  
One Dimensional ◽  
Molybdenum Blue ◽  
Electron Phonon Coupling

Abstract(Quasi-)one-dimensional systems exhibit various fascinating properties such as Luttinger liquid behavior, Peierls transition, novel topological phases, and the accommodation of unique quasiparticles (e.g., spinon, holon, and soliton, etc.). Here we study molybdenum blue bronze A0.3MoO3 (A = K, Rb), a canonical quasi-one-dimensional charge-density-wave material, using laser-based angle-resolved photoemission spectroscopy. Our experiment suggests that the normal phase of A0.3MoO3 is a prototypical Luttinger liquid, from which the charge-density-wave emerges with decreasing temperature. Prominently, we observe strong renormalizations of band dispersions, which are recognized as the spectral function of Holstein polaron derived from band-selective electron-phonon coupling in the system. We argue that the strong electron-phonon coupling plays an important role in electronic properties and the charge-density-wave transition in blue bronzes. Our results not only reconcile the long-standing heavy debates on the electronic properties of blue bronzes but also provide a rare platform to study interesting excitations in Luttinger liquid materials.

scholarly journals Mixed Formamidinium-Methylammonium Lead Iodide perovskite from first-principles: Hydrogen-bonding impact on the electronic properties

2021 ◽  
Author(s):  
Maximiliano Alejandro Senno ◽  
Silvia Tinte
Keyword(s):  
Hydrogen Bonding ◽  
Electronic Properties ◽  
First Principles ◽  
Organic Cations ◽  
Lead Iodide ◽  
Improved Stability ◽  
Methylammonium Lead Iodide

Hybrid perovskites with mixed organic cations such as methylammonium (CH3NH3, MA) and formamidinium (CH(NH2)2, FA) have attracted interest due to their improved stability and capability to tune their properties varying...

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