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

Anharmonic Exciton‐Phonon Coupling in Metal‐Organic Chalcogenides Hybrid Quantum Wells

Journal Article · · Advanced Optical Materials
 [1];  [2];  [3]
  1. The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley California 94720 USA, Walter Schottky Institute and Physik Department Technical University of Munich 85748 Garching Germany
  2. Dipartimento di Scienze Matematiche, Fisiche e Informatiche Universitá di Parma Parma 43124 Italy, Centro S3 CNR‐Istituto Nanoscienze via Campi 213/A Modena I‐41125 Italy
  3. The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley California 94720 USA, Center for Nano Science and Technology @PoliMi Istituto Italiano di Tecnologia Milan 20133 Italy, Dipartimento di Fisica e Astronomia Università di Bologna Viale Berti‐Pichat 6/2 Bologna 40127 Italy
Abstract

In contrast to inorganic quantum wells, hybrid quantum wells (HQWs) based on metal‐organic semiconductors are characterized by relatively soft lattices, in which excitonic states can strongly couple to lattice phonons. Therefore, understanding the lattice's impact on exciton dynamics is essential for harnessing the optoelectronic potential of HQWs. Beyond 2D metal halide perovskites, layered metal‐organic chalcogenides (MOCs), which are an air‐stable, underexplored material class hosting room‐temperature excitons, can be exploited as photodetectors, light emitting devices, and ultrafast photoswitches. Here, the role of phonons in the optical transitions of the prototypical MOC [AgSePh] is elucidated. Impulsive stimulated Raman scattering (ISRS) allows the detection of coherent exciton oscillations driven by Fröhlich interaction with low‐energy optical phonons. Steady state absorption and Raman spectroscopies reveal a strong exciton‐phonon coupling (Huang‐Rhys parameter ≈1.7) and its anharmonicity, manifested as a nontrivial temperature‐dependent Stokes shift. The ab initio calculations support these observations, hinting at an anharmonic behavior of the low‐energy phonons <200 cm −1 . These results untangle complex exciton‐phonon interactions in MOCs, establishing an ideal testbed for room‐temperature many‐body phenomena.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
German Research Foundation (DFG); Italian SuperComputing Resource Allocation (ISCRA); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1922123
Alternate ID(s):
OSTI ID: 1922124
OSTI ID: 2242437
Journal Information:
Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 7 Vol. 11; ISSN 2195-1071
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (68)

Synthesis and Structural Characterization of [Cu20Se4(μ3-SePh)12(PPh3)6] and [Ag(SePh)]∞ journal November 2002
2D Ruddlesden-Popper Perovskites for Optoelectronics journal October 2017
Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites journal February 2021
1-D-Tin(II) Phenylchalcogenolato Complexes ∞ 1 [Sn(EPh) 2 ] (E = S, Se, Te) – Synthesis, Structures, Quantum Chemical Studies and Thermal Behaviour journal January 2010
Temperature Dependence of Stokes Shifts of Excitons and Biexcitons in Al0.61 Ga0.39 N Epitaxial Layer journal January 2018
Rayleigh wing scattering in disordered sodium nitrate journal January 1978
Femtosecond time-resolved measurements of optic phonon dephasing by impulsive stimulated raman scattering in α-perylene crystal from 20 to 300 K journal May 1985
The nature of boson peak in Raman scattering in glasses journal March 1986
Molecular inertial effects in liquids: Poley absorption, collision-induced absorption, low-frequency Raman spectrum and Boson peaks journal September 2002
d10 coinage metal organic chalcogenolates: From oligomers to coordination polymers journal January 2018
Optimization algorithm for the generation of ONCV pseudopotentials journal November 2015
First principles phonon calculations in materials science journal November 2015
Dynamic Exciton Polaron in Two-Dimensional Lead Halide Perovskites and Implications for Optoelectronic Applications journal January 2022
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
Anharmonic Molecular Vibrational Probes of Dynamical Organic–Inorganic Interactions in Two-Dimensional Hybrid Lead Iodide Perovskites journal May 2020
Understanding the Synthetic Pathway to Large-Area, High-Quality [AgSePh] Nanocrystal Films journal September 2020
Revealing Excitonic Phonon Coupling in (PEA) 2 (MA) n −1 Pb n I 3 n +1 2D Layered Perovskites journal June 2020
Exciton Polarons in Two-Dimensional Hybrid Metal-Halide Perovskites journal March 2020
Excitonic and Polaronic Properties of 2D Hybrid Organic–Inorganic Perovskites journal January 2017
Directional Anisotropy of the Vibrational Modes in 2D-Layered Perovskites journal April 2020
Even-Parity Self-Trapped Excitons Lead to Magnetic Dipole Radiation in Two-Dimensional Lead Halide Perovskites journal July 2020
Strongly Quantum-Confined Blue-Emitting Excitons in Chemically Configurable Multiquantum Wells journal November 2020
Picoseconds-Limited Exciton Recombination in Metal–Organic Chalcogenides Hybrid Quantum Wells journal February 2022
Morphological Control of 2D Hybrid Organic–Inorganic Semiconductor AgSePh journal January 2022
Light Emission in 2D Silver Phenylchalcogenolates journal November 2022
Electron–Phonon Scattering in Atomically Thin 2D Perovskites journal October 2016
Giant Electron–Phonon Coupling and Deep Conduction Band Resonance in Metal Halide Double Perovskite journal July 2018
Time-resolved vibrational spectroscopy in the impulsive limit journal January 1994
Size and Quality Enhancement of 2D Semiconducting Metal–Organic Chalcogenolates by Amine Addition journal November 2021
Tarnishing Silver Metal into Mithrene journal September 2018
Origin of the Wing accompanying the Rayleigh Line in Liquids journal November 1935
Electron–phonon coupling in hybrid lead halide perovskites journal May 2016
Ultrafast quantum beats of anisotropic excitons in atomically thin ReS2 journal January 2018
Scaling law for excitons in 2D perovskite quantum wells journal June 2018
Tuning the Fröhlich exciton-phonon scattering in monolayer MoS2 journal February 2019
Dynamic emission Stokes shift and liquid-like dielectric solvation of band edge carriers in lead-halide perovskites journal March 2019
Coordination assembly of 2D ordered organic metal chalcogenides with widely tunable electronic band gaps journal January 2020
Phonon coherences reveal the polaronic character of excitons in two-dimensional lead halide perovskites journal January 2019
Unconventional excitonic states with phonon sidebands in layered silicon diphosphide journal June 2022
Semiconductor physics of organic–inorganic 2D halide perovskites journal December 2020
Polarons in materials journal March 2021
Anisotropic 2D excitons unveiled in organic–inorganic quantum wells journal January 2021
Raman scattering from crystals of the diamond structure journal January 1965
Temperature dependence of semiconductor band gaps journal June 1991
Temperature dependence of Stokes shift in InxGa1−xN epitaxial layers journal February 2003
Impulsive stimulated scattering: General importance in femtosecond laser pulse interactions with matter, and spectroscopic applications journal December 1985
Exciton-phonon coupling in a CsPbBr 3 single nanocrystal journal February 2018
Q uantum ESPRESSO toward the exascale journal April 2020
Low-frequency Raman spectrum of 2D layered perovskites: Local atomistic motion or superlattice modes? journal July 2020
Electrons in lattice fields journal July 1954
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Advanced capabilities for materials modelling with Quantum ESPRESSO journal October 2017
Theory of light absorption and non-radiative transitions in F-centres journal December 1950
Anharmonic Decay of Optical Phonons journal August 1966
Temperature Dependence of the Width of the Fundamental Lattice-Vibration Absorption Peak in Ionic Crystals. II. Approximate Numerical Results journal March 1967
Luminescence linewidths of excitons in GaAs quantum wells below 150 K journal April 1986
Temperature-dependent exciton linewidths in semiconductors journal December 1990
Size dependence of electron—LO-phonon coupling in semiconductor nanocrystals journal April 1996
Coherent phonon generation and the two stimulated Raman tensors journal March 2002
Anomalous Stokes shift in CdSe nanocrystals journal October 2007
Optimized norm-conserving Vanderbilt pseudopotentials journal August 2013
Local Polar Fluctuations in Lead Halide Perovskite Crystals journal March 2017
Quantum beats of excitons in quantum wells journal April 1990
First-Principles Calculation of Vibrational Raman Spectra in Large Systems: Signature of Small Rings in Crystalline S i O 2 journal January 2003
Vibrational dynamics of liquids and solids investigated by picosecond light pulses journal July 1978
Large polarons in lead halide perovskites journal August 2017
Bright magnetic dipole radiation from two-dimensional lead-halide perovskites journal February 2020
Strong self-trapping by deformation potential limits photovoltaic performance in bismuth double perovskite journal February 2021